Update AppConfig.cs
Update AppConfig.cs

Change for VS2015
dongruiqing/WindowsProtocolTestSuites,dongruiqing/WindowsProtocolTestSuites,chenlu0616/WindowsProtocolTestSuites,chenlu0616/WindowsProtocolTestSuites,JessieF/WindowsProtocolTestSuites,JessieF/WindowsProtocolTestSuites