THRIFT-2346 C#: UTF-8 sent by PHP as JSON is not understood by TJsonProtocol

Patch: Jens Geyer
diff --git a/lib/csharp/test/JSON/app.config b/lib/csharp/test/JSON/app.config
new file mode 100644
index 0000000..cb2586b
--- /dev/null
+++ b/lib/csharp/test/JSON/app.config
@@ -0,0 +1,3 @@
+<?xml version="1.0"?>

+<configuration>

+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>