+ converted SerializationTest.Second_Level_Object_Serialization_Querystring to xunit
+ converted SerializationTest.Second_Level_Object_Serialization_Querystring to xunit

swiese/facebook-csharp-sdk,ladyquartermaine/facebook-csharp-sdk,simpleverso/facebook-csharp-sdk,facebook-csharp-sdk/facebook-csharp-sdk,ladyquartermaine/facebook-csharp-sdk,simpleverso/facebook-csharp-sdk,Ali-Shaltout/facebook-csharp-sdk,swiese/facebook-csharp-sdk,Ali-Shaltout/facebook-csharp-sdk,facebook-csharp-sdk/facebook-csharp-sdk