Added recursion limits to AbstractReader.cs
diff --git a/src/ProtocolBuffers.Test/TestWriterFormatJson.cs b/src/ProtocolBuffers.Test/TestWriterFormatJson.cs
index 052d8f2..fe6c22b 100644
--- a/src/ProtocolBuffers.Test/TestWriterFormatJson.cs
+++ b/src/ProtocolBuffers.Test/TestWriterFormatJson.cs
@@ -1,5 +1,6 @@
 using System;

 using System.IO;

+using System.Text;

 using Google.ProtocolBuffers.Serialization;

 using NUnit.Framework;

 using Google.ProtocolBuffers.TestProtos;

@@ -336,6 +337,14 @@
             Assert.AreEqual(3, ordinal);

             Assert.AreEqual(3, builder.TextlinesCount);

         }

+        [Test,ExpectedException(typeof(InvalidProtocolBufferException))]

+        public void TestRecursiveLimit()

+        {

+            StringBuilder sb = new StringBuilder(8192);

+            for (int i = 0; i < 80; i++)

+                sb.Append("{\"child\":");

+            TestXmlRescursive msg = TestXmlRescursive.ParseFromJson(sb.ToString());

+        }

         [Test, ExpectedException(typeof(FormatException))]

         public void FailWithEmptyText()

         {