diff --git a/lib/csharp/src/Protocol/TBinaryProtocol.cs b/lib/csharp/src/Protocol/TBinaryProtocol.cs
index 4b3980e..e6b69d6 100644
--- a/lib/csharp/src/Protocol/TBinaryProtocol.cs
+++ b/lib/csharp/src/Protocol/TBinaryProtocol.cs
@@ -201,7 +201,12 @@
 
 		public override void WriteDouble(double d)
 		{
+#if !SILVERLIGHT
 			WriteI64(BitConverter.DoubleToInt64Bits(d));
+#else
+            var bytes = BitConverter.GetBytes(d);
+            WriteI64(BitConverter.ToInt64(bytes, 0));
+#endif
 		}
 
 		public override void WriteBinary(byte[] b)
@@ -348,7 +353,13 @@
 
 		public override double ReadDouble()
 		{
+#if !SILVERLIGHT
 			return BitConverter.Int64BitsToDouble(ReadI64());
+#else
+            var value = ReadI64();
+            var bytes = BitConverter.GetBytes(value);
+            return BitConverter.ToDouble(bytes, 0);
+#endif
 		}
 
 		public void SetReadLength(int readLength)
@@ -382,7 +393,7 @@
 			CheckReadLength(size);
 			byte[] buf = new byte[size];
 			trans.ReadAll(buf, 0, size);
-			return Encoding.UTF8.GetString(buf);
+			return Encoding.UTF8.GetString(buf, 0, buf.Length);
 		}
 
 		private int ReadAll(byte[] buf, int off, int len)
diff --git a/lib/csharp/src/Protocol/TJSONProtocol.cs b/lib/csharp/src/Protocol/TJSONProtocol.cs
index a35fcd3..ed6970e 100644
--- a/lib/csharp/src/Protocol/TJSONProtocol.cs
+++ b/lib/csharp/src/Protocol/TJSONProtocol.cs
@@ -841,7 +841,7 @@
 			if (reader.Peek() == QUOTE[0])
 			{
 				byte[] arr = ReadJSONString(true);
-				double dub = Double.Parse(utf8Encoding.GetString(arr), CultureInfo.InvariantCulture);
+				double dub = Double.Parse(utf8Encoding.GetString(arr,0,arr.Length), CultureInfo.InvariantCulture);
 
 				if (!context.EscapeNumbers() && !Double.IsNaN(dub) &&
 					!Double.IsInfinity(dub))
@@ -938,7 +938,8 @@
 											 "Message contained bad version.");
 			}
 
-			message.Name = utf8Encoding.GetString(ReadJSONString(false));
+            var buf = ReadJSONString(false);
+			message.Name = utf8Encoding.GetString(buf,0,buf.Length);
 			message.Type = (TMessageType)ReadJSONInteger();
 			message.SeqID = (int)ReadJSONInteger();
 			return message;
@@ -1059,7 +1060,8 @@
 
 		public override String ReadString()
 		{
-			return utf8Encoding.GetString(ReadJSONString(false));
+            var buf = ReadJSONString(false);
+			return utf8Encoding.GetString(buf,0,buf.Length);
 		}
 
 		public override byte[] ReadBinary()
diff --git a/lib/csharp/src/Protocol/TProtocol.cs b/lib/csharp/src/Protocol/TProtocol.cs
index 4f723dd..b6884c9 100644
--- a/lib/csharp/src/Protocol/TProtocol.cs
+++ b/lib/csharp/src/Protocol/TProtocol.cs
@@ -84,8 +84,9 @@
 		public abstract long ReadI64();
 		public abstract double ReadDouble();
 		public virtual string ReadString() {
-		       return Encoding.UTF8.GetString(ReadBinary());
-		}
+            var buf = ReadBinary();
+            return Encoding.UTF8.GetString(buf, 0, buf.Length);
+        }
 		public abstract byte[] ReadBinary();
 	}
 }