Fix a break to UWP runs.
Fix a break to UWP runs.

* Expected to fix an "exceeds Max_Path" error.

ericstj/wcf,shmao/wcf,mconnew/wcf,imcarolwang/wcf,StephenBonikowsky/wcf,ElJerry/wcf,ElJerry/wcf,KKhurin/wcf,ericstj/wcf,StephenBonikowsky/wcf,zhenlan/wcf,dotnet/wcf,MattGal/wcf,mconnew/wcf,zhenlan/wcf,KKhurin/wcf,dotnet/wcf,shmao/wcf,mconnew/wcf,imcarolwang/wcf,hongdai/wcf,imcarolwang/wcf,MattGal/wcf,dotnet/wcf,hongdai/wcf