diff --git a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
index 037e9a0..878febe 100644
--- a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
+++ b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
@@ -1,459 +1,526 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// http://github.com/jskeet/dotnet-protobufs/
-// Original C++/Java/Python code:
-// http://code.google.com/p/protobuf/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
-
-using System;
-using System.IO;
-using Google.ProtocolBuffers.TestProtos;
-using NUnit.Framework;
-using System.Diagnostics;
-
-namespace Google.ProtocolBuffers {
-  [TestFixture]
-  public class CodedInputStreamTest {
-
-    /// <summary>
-    /// Helper to construct a byte array from a bunch of bytes.  The inputs are
-    /// actually ints so that I can use hex notation and not get stupid errors
-    /// about precision.
-    /// </summary>
-    private static byte[] Bytes(params int[] bytesAsInts) {
-      byte[] bytes = new byte[bytesAsInts.Length];
-      for (int i = 0; i < bytesAsInts.Length; i++) {
-        bytes[i] = (byte)bytesAsInts[i];
-      }
-      return bytes;
-    }
-
-    /// <summary>
-    /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64() and
-    /// </summary>
-    private static void AssertReadVarint(byte[] data, ulong value) {
-      CodedInputStream input = CodedInputStream.CreateInstance(data);
-      Assert.AreEqual((uint)value, input.ReadRawVarint32());
-
-      input = CodedInputStream.CreateInstance(data);
-      Assert.AreEqual(value, input.ReadRawVarint64());
-      Assert.IsTrue(input.IsAtEnd);
-
-      // Try different block sizes.
-      for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2) {
-        input = CodedInputStream.CreateInstance(new SmallBlockInputStream(data, bufferSize));
-        Assert.AreEqual((uint)value, input.ReadRawVarint32());
-
-        input = CodedInputStream.CreateInstance(new SmallBlockInputStream(data, bufferSize));
-        Assert.AreEqual(value, input.ReadRawVarint64());
-        Assert.IsTrue(input.IsAtEnd);
-      }
-
-      // Try reading directly from a MemoryStream. We want to verify that it
-      // doesn't read past the end of the input, so write an extra byte - this
-      // lets us test the position at the end.
-      MemoryStream memoryStream = new MemoryStream();
-      memoryStream.Write(data, 0, data.Length);
-      memoryStream.WriteByte(0);
-      memoryStream.Position = 0;
-      Assert.AreEqual((uint)value, CodedInputStream.ReadRawVarint32(memoryStream));
-      Assert.AreEqual(data.Length, memoryStream.Position);
-    }
-
-    /// <summary>
-    /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64() and
-    /// expects them to fail with an InvalidProtocolBufferException whose
-    /// description matches the given one.
-    /// </summary>
-    private static void AssertReadVarintFailure(InvalidProtocolBufferException expected, byte[] data) {
-      CodedInputStream input = CodedInputStream.CreateInstance(data);
-      try {
-        input.ReadRawVarint32();
-        Assert.Fail("Should have thrown an exception.");
-      } catch (InvalidProtocolBufferException e) {
-        Assert.AreEqual(expected.Message, e.Message);
-      }
-
-      input = CodedInputStream.CreateInstance(data);
-      try {
-        input.ReadRawVarint64();
-        Assert.Fail("Should have thrown an exception.");
-      } catch (InvalidProtocolBufferException e) {
-        Assert.AreEqual(expected.Message, e.Message);
-      }
-
-      // Make sure we get the same error when reading directly from a Stream.
-      try {
-        CodedInputStream.ReadRawVarint32(new MemoryStream(data));
-        Assert.Fail("Should have thrown an exception.");
-      } catch (InvalidProtocolBufferException e) {
-        Assert.AreEqual(expected.Message, e.Message);
-      }
-    }
-
-    [Test]
-    public void ReadVarint() {
-      AssertReadVarint(Bytes(0x00), 0);
-      AssertReadVarint(Bytes(0x01), 1);
-      AssertReadVarint(Bytes(0x7f), 127);
-      // 14882
-      AssertReadVarint(Bytes(0xa2, 0x74), (0x22 << 0) | (0x74 << 7));
-      // 2961488830
-      AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x0b),
-        (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
-        (0x0bL << 28));
-
-      // 64-bit
-      // 7256456126
-      AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x1b),
-        (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
-        (0x1bL << 28));
-      // 41256202580718336
-      AssertReadVarint(Bytes(0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49),
-        (0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) |
-        (0x43L << 28) | (0x49L << 35) | (0x24L << 42) | (0x49L << 49));
-      // 11964378330978735131
-      AssertReadVarint(Bytes(0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01),
-        (0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) |
-        (0x3bUL << 28) | (0x56UL << 35) | (0x00UL << 42) |
-        (0x05UL << 49) | (0x26UL << 56) | (0x01UL << 63));
-
-      // Failures
-      AssertReadVarintFailure(
-        InvalidProtocolBufferException.MalformedVarint(),
-        Bytes(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-              0x00));
-      AssertReadVarintFailure(
-        InvalidProtocolBufferException.TruncatedMessage(),
-        Bytes(0x80));
-    }
-
-    /// <summary>
-    /// Parses the given bytes using ReadRawLittleEndian32() and checks
-    /// that the result matches the given value.
-    /// </summary>
-    private static void AssertReadLittleEndian32(byte[] data, uint value) {
-      CodedInputStream input = CodedInputStream.CreateInstance(data);
-      Assert.AreEqual(value, input.ReadRawLittleEndian32());
-      Assert.IsTrue(input.IsAtEnd);
-
-      // Try different block sizes.
-      for (int blockSize = 1; blockSize <= 16; blockSize *= 2) {
-        input = CodedInputStream.CreateInstance(
-          new SmallBlockInputStream(data, blockSize));
-        Assert.AreEqual(value, input.ReadRawLittleEndian32());
-        Assert.IsTrue(input.IsAtEnd);
-      }
-    }
-
-    /// <summary>
-    /// Parses the given bytes using ReadRawLittleEndian64() and checks
-    /// that the result matches the given value.
-    /// </summary>
-    private static void AssertReadLittleEndian64(byte[] data, ulong value) {
-      CodedInputStream input = CodedInputStream.CreateInstance(data);
-      Assert.AreEqual(value, input.ReadRawLittleEndian64());
-      Assert.IsTrue(input.IsAtEnd);
-
-      // Try different block sizes.
-      for (int blockSize = 1; blockSize <= 16; blockSize *= 2) {
-        input = CodedInputStream.CreateInstance(
-          new SmallBlockInputStream(data, blockSize));
-        Assert.AreEqual(value, input.ReadRawLittleEndian64());
-        Assert.IsTrue(input.IsAtEnd);
-      }
-    }
-
-    [Test]
-    public void ReadLittleEndian() {
-      AssertReadLittleEndian32(Bytes(0x78, 0x56, 0x34, 0x12), 0x12345678);
-      AssertReadLittleEndian32(Bytes(0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef0);
-
-      AssertReadLittleEndian64(Bytes(0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12),
-        0x123456789abcdef0L);
-      AssertReadLittleEndian64(
-        Bytes(0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef012345678UL);
-    }
-
-    [Test]
-    public void DecodeZigZag32() {
-      Assert.AreEqual(0, CodedInputStream.DecodeZigZag32(0));
-      Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(1));
-      Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(2));
-      Assert.AreEqual(-2, CodedInputStream.DecodeZigZag32(3));
-      Assert.AreEqual(0x3FFFFFFF, CodedInputStream.DecodeZigZag32(0x7FFFFFFE));
-      Assert.AreEqual(unchecked((int)0xC0000000), CodedInputStream.DecodeZigZag32(0x7FFFFFFF));
-      Assert.AreEqual(0x7FFFFFFF, CodedInputStream.DecodeZigZag32(0xFFFFFFFE));
-      Assert.AreEqual(unchecked((int)0x80000000), CodedInputStream.DecodeZigZag32(0xFFFFFFFF));
-    }
-
-    [Test]
-    public void DecodeZigZag64() {
-      Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(0));
-      Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(1));
-      Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(2));
-      Assert.AreEqual(-2, CodedInputStream.DecodeZigZag64(3));
-      Assert.AreEqual(0x000000003FFFFFFFL, CodedInputStream.DecodeZigZag64(0x000000007FFFFFFEL));
-      Assert.AreEqual(unchecked((long)0xFFFFFFFFC0000000L), CodedInputStream.DecodeZigZag64(0x000000007FFFFFFFL));
-      Assert.AreEqual(0x000000007FFFFFFFL, CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFEL));
-      Assert.AreEqual(unchecked((long)0xFFFFFFFF80000000L), CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFFL));
-      Assert.AreEqual(0x7FFFFFFFFFFFFFFFL, CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFEL));
-      Assert.AreEqual(unchecked((long)0x8000000000000000L), CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFFL));
-    }
-
-    [Test]
-    public void ReadWholeMessage() {
-      TestAllTypes message = TestUtil.GetAllSet();
-
-      byte[] rawBytes = message.ToByteArray();
-      Assert.AreEqual(rawBytes.Length, message.SerializedSize);
-      TestAllTypes message2 = TestAllTypes.ParseFrom(rawBytes);
-      TestUtil.AssertAllFieldsSet(message2);
-
-      // Try different block sizes.
-      for (int blockSize = 1; blockSize < 256; blockSize *= 2) {
-        message2 = TestAllTypes.ParseFrom(new SmallBlockInputStream(rawBytes, blockSize));
-        TestUtil.AssertAllFieldsSet(message2);
-      }
-    }
-
-    [Test]
-    public void SkipWholeMessage() {
-      TestAllTypes message = TestUtil.GetAllSet();
-      byte[] rawBytes = message.ToByteArray();
-
-      // Create two parallel inputs.  Parse one as unknown fields while using
-      // skipField() to skip each field on the other.  Expect the same tags.
-      CodedInputStream input1 = CodedInputStream.CreateInstance(rawBytes);
-      CodedInputStream input2 = CodedInputStream.CreateInstance(rawBytes);
-      UnknownFieldSet.Builder unknownFields = UnknownFieldSet.CreateBuilder();
-
-      while (true) {
-        uint tag = input1.ReadTag();
-        Assert.AreEqual(tag, input2.ReadTag());
-        if (tag == 0) {
-          break;
-        }
-        unknownFields.MergeFieldFrom(tag, input1);
-        input2.SkipField(tag);
-      }
-    }
-
-    /// <summary>
-    /// Test that a bug in SkipRawBytes has been fixed: if the skip
-    /// skips exactly up to a limit, this should bnot break things
-    /// </summary>
-    [Test]
-    public void SkipRawBytesBug() {
-      byte[] rawBytes = new byte[] { 1, 2 };
-      CodedInputStream input = CodedInputStream.CreateInstance(rawBytes);
-
-      int limit = input.PushLimit(1);
-      input.SkipRawBytes(1);
-      input.PopLimit(limit);
-      Assert.AreEqual(2, input.ReadRawByte());
-    }
-
-    public void ReadHugeBlob() {
-      // Allocate and initialize a 1MB blob.
-      byte[] blob = new byte[1 << 20];
-      for (int i = 0; i < blob.Length; i++) {
-        blob[i] = (byte)i;
-      }
-
-      // Make a message containing it.
-      TestAllTypes.Builder builder = TestAllTypes.CreateBuilder();
-      TestUtil.SetAllFields(builder);
-      builder.SetOptionalBytes(ByteString.CopyFrom(blob));
-      TestAllTypes message = builder.Build();
-
-      // Serialize and parse it.  Make sure to parse from an InputStream, not
-      // directly from a ByteString, so that CodedInputStream uses buffered
-      // reading.
-      TestAllTypes message2 = TestAllTypes.ParseFrom(message.ToByteString().CreateCodedInput());
-
-      Assert.AreEqual(message.OptionalBytes, message2.OptionalBytes);
-
-      // Make sure all the other fields were parsed correctly.
-      TestAllTypes message3 = TestAllTypes.CreateBuilder(message2)
-        .SetOptionalBytes(TestUtil.GetAllSet().OptionalBytes)
-        .Build();
-      TestUtil.AssertAllFieldsSet(message3);
-    }
-
-    [Test]
-    public void ReadMaliciouslyLargeBlob() {
-      MemoryStream ms = new MemoryStream();
-      CodedOutputStream output = CodedOutputStream.CreateInstance(ms);
-
-      uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
-      output.WriteRawVarint32(tag);
-      output.WriteRawVarint32(0x7FFFFFFF);
-      output.WriteRawBytes(new byte[32]);  // Pad with a few random bytes.
-      output.Flush();
-      ms.Position = 0;
-
-      CodedInputStream input = CodedInputStream.CreateInstance(ms);
-      Assert.AreEqual(tag, input.ReadTag());
-
-      try {
-        input.ReadBytes();
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // success.
-      }
-    }
-    
-    private static TestRecursiveMessage MakeRecursiveMessage(int depth) {
-      if (depth == 0) {
-        return TestRecursiveMessage.CreateBuilder().SetI(5).Build();
-      } else {
-        return TestRecursiveMessage.CreateBuilder()
-          .SetA(MakeRecursiveMessage(depth - 1)).Build();
-      }
-    }
-
-    private static void AssertMessageDepth(TestRecursiveMessage message, int depth) {
-      if (depth == 0) {
-        Assert.IsFalse(message.HasA);
-        Assert.AreEqual(5, message.I);
-      } else {
-        Assert.IsTrue(message.HasA);
-        AssertMessageDepth(message.A, depth - 1);
-      }
-    }
-
-    [Test]
-    public void MaliciousRecursion() {
-      ByteString data64 = MakeRecursiveMessage(64).ToByteString();
-      ByteString data65 = MakeRecursiveMessage(65).ToByteString();
-
-      AssertMessageDepth(TestRecursiveMessage.ParseFrom(data64), 64);
-
-      try {
-        TestRecursiveMessage.ParseFrom(data65);
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // success.
-      }
-
-      CodedInputStream input = data64.CreateCodedInput();
-      input.SetRecursionLimit(8);
-      try {
-        TestRecursiveMessage.ParseFrom(input);
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // success.
-      }
-    }
-
-    [Test]
-    public void SizeLimit() {
-      // Have to use a Stream rather than ByteString.CreateCodedInput as SizeLimit doesn't
-      // apply to the latter case.
-      MemoryStream ms = new MemoryStream(TestUtil.GetAllSet().ToByteString().ToByteArray());
-      CodedInputStream input = CodedInputStream.CreateInstance(ms);
-      input.SetSizeLimit(16);
-
-      try {
-        TestAllTypes.ParseFrom(input);
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // success.
-      }
-    }
-
-    [Test]
-    public void ResetSizeCounter() {
-      CodedInputStream input = CodedInputStream.CreateInstance(
-          new SmallBlockInputStream(new byte[256], 8));
-      input.SetSizeLimit(16);
-      input.ReadRawBytes(16);
-
-      try {
-        input.ReadRawByte();
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // Success.
-      }
-
-      input.ResetSizeCounter();
-      input.ReadRawByte();  // No exception thrown.
-
-      try {
-        input.ReadRawBytes(16);  // Hits limit again.
-        Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException) {
-        // Success.
-      }
-    }
-
-    /// <summary>
-    /// Tests that if we read an string that contains invalid UTF-8, no exception
-    /// is thrown.  Instead, the invalid bytes are replaced with the Unicode
-    /// "replacement character" U+FFFD.
-    /// </summary>
-    [Test]
-    public void ReadInvalidUtf8()  {
-      MemoryStream ms = new MemoryStream();
-      CodedOutputStream output = CodedOutputStream.CreateInstance(ms);
-
-      uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
-      output.WriteRawVarint32(tag);
-      output.WriteRawVarint32(1);
-      output.WriteRawBytes(new byte[] { 0x80 });
-      output.Flush();
-      ms.Position = 0;
-
-      CodedInputStream input = CodedInputStream.CreateInstance(ms);
-      Assert.AreEqual(tag, input.ReadTag());
-      string text = input.ReadString();
-      Assert.AreEqual('\ufffd', text[0]);
-    }
-
-    /// <summary>
-    /// A stream which limits the number of bytes it reads at a time.
-    /// We use this to make sure that CodedInputStream doesn't screw up when
-    /// reading in small blocks.
-    /// </summary>
-    private sealed class SmallBlockInputStream : MemoryStream {
-      private readonly int blockSize;
-
-      public SmallBlockInputStream(byte[] data, int blockSize)
-        : base(data) {
-        this.blockSize = blockSize;
-      }
-
-      public override int Read(byte[] buffer, int offset, int count) {
-        return base.Read(buffer, offset, Math.Min(count, blockSize));
-      }
-    }
-  }
-}
+#region Copyright notice and license
+
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.IO;
+using Google.ProtocolBuffers.TestProtos;
+using NUnit.Framework;
+using System.Diagnostics;
+
+namespace Google.ProtocolBuffers
+{
+    [TestFixture]
+    public class CodedInputStreamTest
+    {
+        /// <summary>
+        /// Helper to construct a byte array from a bunch of bytes.  The inputs are
+        /// actually ints so that I can use hex notation and not get stupid errors
+        /// about precision.
+        /// </summary>
+        private static byte[] Bytes(params int[] bytesAsInts)
+        {
+            byte[] bytes = new byte[bytesAsInts.Length];
+            for (int i = 0; i < bytesAsInts.Length; i++)
+            {
+                bytes[i] = (byte) bytesAsInts[i];
+            }
+            return bytes;
+        }
+
+        /// <summary>
+        /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64() and
+        /// </summary>
+        private static void AssertReadVarint(byte[] data, ulong value)
+        {
+            CodedInputStream input = CodedInputStream.CreateInstance(data);
+            Assert.AreEqual((uint) value, input.ReadRawVarint32());
+
+            input = CodedInputStream.CreateInstance(data);
+            Assert.AreEqual(value, input.ReadRawVarint64());
+            Assert.IsTrue(input.IsAtEnd);
+
+            // Try different block sizes.
+            for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2)
+            {
+                input = CodedInputStream.CreateInstance(new SmallBlockInputStream(data, bufferSize));
+                Assert.AreEqual((uint) value, input.ReadRawVarint32());
+
+                input = CodedInputStream.CreateInstance(new SmallBlockInputStream(data, bufferSize));
+                Assert.AreEqual(value, input.ReadRawVarint64());
+                Assert.IsTrue(input.IsAtEnd);
+            }
+
+            // Try reading directly from a MemoryStream. We want to verify that it
+            // doesn't read past the end of the input, so write an extra byte - this
+            // lets us test the position at the end.
+            MemoryStream memoryStream = new MemoryStream();
+            memoryStream.Write(data, 0, data.Length);
+            memoryStream.WriteByte(0);
+            memoryStream.Position = 0;
+            Assert.AreEqual((uint) value, CodedInputStream.ReadRawVarint32(memoryStream));
+            Assert.AreEqual(data.Length, memoryStream.Position);
+        }
+
+        /// <summary>
+        /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64() and
+        /// expects them to fail with an InvalidProtocolBufferException whose
+        /// description matches the given one.
+        /// </summary>
+        private static void AssertReadVarintFailure(InvalidProtocolBufferException expected, byte[] data)
+        {
+            CodedInputStream input = CodedInputStream.CreateInstance(data);
+            try
+            {
+                input.ReadRawVarint32();
+                Assert.Fail("Should have thrown an exception.");
+            }
+            catch (InvalidProtocolBufferException e)
+            {
+                Assert.AreEqual(expected.Message, e.Message);
+            }
+
+            input = CodedInputStream.CreateInstance(data);
+            try
+            {
+                input.ReadRawVarint64();
+                Assert.Fail("Should have thrown an exception.");
+            }
+            catch (InvalidProtocolBufferException e)
+            {
+                Assert.AreEqual(expected.Message, e.Message);
+            }
+
+            // Make sure we get the same error when reading directly from a Stream.
+            try
+            {
+                CodedInputStream.ReadRawVarint32(new MemoryStream(data));
+                Assert.Fail("Should have thrown an exception.");
+            }
+            catch (InvalidProtocolBufferException e)
+            {
+                Assert.AreEqual(expected.Message, e.Message);
+            }
+        }
+
+        [Test]
+        public void ReadVarint()
+        {
+            AssertReadVarint(Bytes(0x00), 0);
+            AssertReadVarint(Bytes(0x01), 1);
+            AssertReadVarint(Bytes(0x7f), 127);
+            // 14882
+            AssertReadVarint(Bytes(0xa2, 0x74), (0x22 << 0) | (0x74 << 7));
+            // 2961488830
+            AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x0b),
+                             (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
+                             (0x0bL << 28));
+
+            // 64-bit
+            // 7256456126
+            AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x1b),
+                             (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
+                             (0x1bL << 28));
+            // 41256202580718336
+            AssertReadVarint(Bytes(0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49),
+                             (0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) |
+                             (0x43L << 28) | (0x49L << 35) | (0x24L << 42) | (0x49L << 49));
+            // 11964378330978735131
+            AssertReadVarint(Bytes(0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01),
+                             (0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) |
+                             (0x3bUL << 28) | (0x56UL << 35) | (0x00UL << 42) |
+                             (0x05UL << 49) | (0x26UL << 56) | (0x01UL << 63));
+
+            // Failures
+            AssertReadVarintFailure(
+                InvalidProtocolBufferException.MalformedVarint(),
+                Bytes(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+                      0x00));
+            AssertReadVarintFailure(
+                InvalidProtocolBufferException.TruncatedMessage(),
+                Bytes(0x80));
+        }
+
+        /// <summary>
+        /// Parses the given bytes using ReadRawLittleEndian32() and checks
+        /// that the result matches the given value.
+        /// </summary>
+        private static void AssertReadLittleEndian32(byte[] data, uint value)
+        {
+            CodedInputStream input = CodedInputStream.CreateInstance(data);
+            Assert.AreEqual(value, input.ReadRawLittleEndian32());
+            Assert.IsTrue(input.IsAtEnd);
+
+            // Try different block sizes.
+            for (int blockSize = 1; blockSize <= 16; blockSize *= 2)
+            {
+                input = CodedInputStream.CreateInstance(
+                    new SmallBlockInputStream(data, blockSize));
+                Assert.AreEqual(value, input.ReadRawLittleEndian32());
+                Assert.IsTrue(input.IsAtEnd);
+            }
+        }
+
+        /// <summary>
+        /// Parses the given bytes using ReadRawLittleEndian64() and checks
+        /// that the result matches the given value.
+        /// </summary>
+        private static void AssertReadLittleEndian64(byte[] data, ulong value)
+        {
+            CodedInputStream input = CodedInputStream.CreateInstance(data);
+            Assert.AreEqual(value, input.ReadRawLittleEndian64());
+            Assert.IsTrue(input.IsAtEnd);
+
+            // Try different block sizes.
+            for (int blockSize = 1; blockSize <= 16; blockSize *= 2)
+            {
+                input = CodedInputStream.CreateInstance(
+                    new SmallBlockInputStream(data, blockSize));
+                Assert.AreEqual(value, input.ReadRawLittleEndian64());
+                Assert.IsTrue(input.IsAtEnd);
+            }
+        }
+
+        [Test]
+        public void ReadLittleEndian()
+        {
+            AssertReadLittleEndian32(Bytes(0x78, 0x56, 0x34, 0x12), 0x12345678);
+            AssertReadLittleEndian32(Bytes(0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef0);
+
+            AssertReadLittleEndian64(Bytes(0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12),
+                                     0x123456789abcdef0L);
+            AssertReadLittleEndian64(
+                Bytes(0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef012345678UL);
+        }
+
+        [Test]
+        public void DecodeZigZag32()
+        {
+            Assert.AreEqual(0, CodedInputStream.DecodeZigZag32(0));
+            Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(1));
+            Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(2));
+            Assert.AreEqual(-2, CodedInputStream.DecodeZigZag32(3));
+            Assert.AreEqual(0x3FFFFFFF, CodedInputStream.DecodeZigZag32(0x7FFFFFFE));
+            Assert.AreEqual(unchecked((int) 0xC0000000), CodedInputStream.DecodeZigZag32(0x7FFFFFFF));
+            Assert.AreEqual(0x7FFFFFFF, CodedInputStream.DecodeZigZag32(0xFFFFFFFE));
+            Assert.AreEqual(unchecked((int) 0x80000000), CodedInputStream.DecodeZigZag32(0xFFFFFFFF));
+        }
+
+        [Test]
+        public void DecodeZigZag64()
+        {
+            Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(0));
+            Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(1));
+            Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(2));
+            Assert.AreEqual(-2, CodedInputStream.DecodeZigZag64(3));
+            Assert.AreEqual(0x000000003FFFFFFFL, CodedInputStream.DecodeZigZag64(0x000000007FFFFFFEL));
+            Assert.AreEqual(unchecked((long) 0xFFFFFFFFC0000000L), CodedInputStream.DecodeZigZag64(0x000000007FFFFFFFL));
+            Assert.AreEqual(0x000000007FFFFFFFL, CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFEL));
+            Assert.AreEqual(unchecked((long) 0xFFFFFFFF80000000L), CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFFL));
+            Assert.AreEqual(0x7FFFFFFFFFFFFFFFL, CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFEL));
+            Assert.AreEqual(unchecked((long) 0x8000000000000000L), CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFFL));
+        }
+
+        [Test]
+        public void ReadWholeMessage()
+        {
+            TestAllTypes message = TestUtil.GetAllSet();
+
+            byte[] rawBytes = message.ToByteArray();
+            Assert.AreEqual(rawBytes.Length, message.SerializedSize);
+            TestAllTypes message2 = TestAllTypes.ParseFrom(rawBytes);
+            TestUtil.AssertAllFieldsSet(message2);
+
+            // Try different block sizes.
+            for (int blockSize = 1; blockSize < 256; blockSize *= 2)
+            {
+                message2 = TestAllTypes.ParseFrom(new SmallBlockInputStream(rawBytes, blockSize));
+                TestUtil.AssertAllFieldsSet(message2);
+            }
+        }
+
+        [Test]
+        public void SkipWholeMessage()
+        {
+            TestAllTypes message = TestUtil.GetAllSet();
+            byte[] rawBytes = message.ToByteArray();
+
+            // Create two parallel inputs.  Parse one as unknown fields while using
+            // skipField() to skip each field on the other.  Expect the same tags.
+            CodedInputStream input1 = CodedInputStream.CreateInstance(rawBytes);
+            CodedInputStream input2 = CodedInputStream.CreateInstance(rawBytes);
+            UnknownFieldSet.Builder unknownFields = UnknownFieldSet.CreateBuilder();
+
+            while (true)
+            {
+                uint tag = input1.ReadTag();
+                Assert.AreEqual(tag, input2.ReadTag());
+                if (tag == 0)
+                {
+                    break;
+                }
+                unknownFields.MergeFieldFrom(tag, input1);
+                input2.SkipField(tag);
+            }
+        }
+
+        /// <summary>
+        /// Test that a bug in SkipRawBytes has been fixed: if the skip
+        /// skips exactly up to a limit, this should bnot break things
+        /// </summary>
+        [Test]
+        public void SkipRawBytesBug()
+        {
+            byte[] rawBytes = new byte[] {1, 2};
+            CodedInputStream input = CodedInputStream.CreateInstance(rawBytes);
+
+            int limit = input.PushLimit(1);
+            input.SkipRawBytes(1);
+            input.PopLimit(limit);
+            Assert.AreEqual(2, input.ReadRawByte());
+        }
+
+        public void ReadHugeBlob()
+        {
+            // Allocate and initialize a 1MB blob.
+            byte[] blob = new byte[1 << 20];
+            for (int i = 0; i < blob.Length; i++)
+            {
+                blob[i] = (byte) i;
+            }
+
+            // Make a message containing it.
+            TestAllTypes.Builder builder = TestAllTypes.CreateBuilder();
+            TestUtil.SetAllFields(builder);
+            builder.SetOptionalBytes(ByteString.CopyFrom(blob));
+            TestAllTypes message = builder.Build();
+
+            // Serialize and parse it.  Make sure to parse from an InputStream, not
+            // directly from a ByteString, so that CodedInputStream uses buffered
+            // reading.
+            TestAllTypes message2 = TestAllTypes.ParseFrom(message.ToByteString().CreateCodedInput());
+
+            Assert.AreEqual(message.OptionalBytes, message2.OptionalBytes);
+
+            // Make sure all the other fields were parsed correctly.
+            TestAllTypes message3 = TestAllTypes.CreateBuilder(message2)
+                .SetOptionalBytes(TestUtil.GetAllSet().OptionalBytes)
+                .Build();
+            TestUtil.AssertAllFieldsSet(message3);
+        }
+
+        [Test]
+        public void ReadMaliciouslyLargeBlob()
+        {
+            MemoryStream ms = new MemoryStream();
+            CodedOutputStream output = CodedOutputStream.CreateInstance(ms);
+
+            uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
+            output.WriteRawVarint32(tag);
+            output.WriteRawVarint32(0x7FFFFFFF);
+            output.WriteRawBytes(new byte[32]); // Pad with a few random bytes.
+            output.Flush();
+            ms.Position = 0;
+
+            CodedInputStream input = CodedInputStream.CreateInstance(ms);
+            Assert.AreEqual(tag, input.ReadTag());
+
+            try
+            {
+                input.ReadBytes();
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // success.
+            }
+        }
+
+        private static TestRecursiveMessage MakeRecursiveMessage(int depth)
+        {
+            if (depth == 0)
+            {
+                return TestRecursiveMessage.CreateBuilder().SetI(5).Build();
+            }
+            else
+            {
+                return TestRecursiveMessage.CreateBuilder()
+                    .SetA(MakeRecursiveMessage(depth - 1)).Build();
+            }
+        }
+
+        private static void AssertMessageDepth(TestRecursiveMessage message, int depth)
+        {
+            if (depth == 0)
+            {
+                Assert.IsFalse(message.HasA);
+                Assert.AreEqual(5, message.I);
+            }
+            else
+            {
+                Assert.IsTrue(message.HasA);
+                AssertMessageDepth(message.A, depth - 1);
+            }
+        }
+
+        [Test]
+        public void MaliciousRecursion()
+        {
+            ByteString data64 = MakeRecursiveMessage(64).ToByteString();
+            ByteString data65 = MakeRecursiveMessage(65).ToByteString();
+
+            AssertMessageDepth(TestRecursiveMessage.ParseFrom(data64), 64);
+
+            try
+            {
+                TestRecursiveMessage.ParseFrom(data65);
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // success.
+            }
+
+            CodedInputStream input = data64.CreateCodedInput();
+            input.SetRecursionLimit(8);
+            try
+            {
+                TestRecursiveMessage.ParseFrom(input);
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // success.
+            }
+        }
+
+        [Test]
+        public void SizeLimit()
+        {
+            // Have to use a Stream rather than ByteString.CreateCodedInput as SizeLimit doesn't
+            // apply to the latter case.
+            MemoryStream ms = new MemoryStream(TestUtil.GetAllSet().ToByteString().ToByteArray());
+            CodedInputStream input = CodedInputStream.CreateInstance(ms);
+            input.SetSizeLimit(16);
+
+            try
+            {
+                TestAllTypes.ParseFrom(input);
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // success.
+            }
+        }
+
+        [Test]
+        public void ResetSizeCounter()
+        {
+            CodedInputStream input = CodedInputStream.CreateInstance(
+                new SmallBlockInputStream(new byte[256], 8));
+            input.SetSizeLimit(16);
+            input.ReadRawBytes(16);
+
+            try
+            {
+                input.ReadRawByte();
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // Success.
+            }
+
+            input.ResetSizeCounter();
+            input.ReadRawByte(); // No exception thrown.
+
+            try
+            {
+                input.ReadRawBytes(16); // Hits limit again.
+                Assert.Fail("Should have thrown an exception!");
+            }
+            catch (InvalidProtocolBufferException)
+            {
+                // Success.
+            }
+        }
+
+        /// <summary>
+        /// Tests that if we read an string that contains invalid UTF-8, no exception
+        /// is thrown.  Instead, the invalid bytes are replaced with the Unicode
+        /// "replacement character" U+FFFD.
+        /// </summary>
+        [Test]
+        public void ReadInvalidUtf8()
+        {
+            MemoryStream ms = new MemoryStream();
+            CodedOutputStream output = CodedOutputStream.CreateInstance(ms);
+
+            uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
+            output.WriteRawVarint32(tag);
+            output.WriteRawVarint32(1);
+            output.WriteRawBytes(new byte[] {0x80});
+            output.Flush();
+            ms.Position = 0;
+
+            CodedInputStream input = CodedInputStream.CreateInstance(ms);
+            Assert.AreEqual(tag, input.ReadTag());
+            string text = input.ReadString();
+            Assert.AreEqual('\ufffd', text[0]);
+        }
+
+        /// <summary>
+        /// A stream which limits the number of bytes it reads at a time.
+        /// We use this to make sure that CodedInputStream doesn't screw up when
+        /// reading in small blocks.
+        /// </summary>
+        private sealed class SmallBlockInputStream : MemoryStream
+        {
+            private readonly int blockSize;
+
+            public SmallBlockInputStream(byte[] data, int blockSize)
+                : base(data)
+            {
+                this.blockSize = blockSize;
+            }
+
+            public override int Read(byte[] buffer, int offset, int count)
+            {
+                return base.Read(buffer, offset, Math.Min(count, blockSize));
+            }
+        }
+    }
+}
\ No newline at end of file