title: i can't use the azure ad sample, rebuild error
body: <p>i clone the active-directory-dotnet-graphapi-web(<a href="https://github.com/Azure-Samples/active-directory-dotnet-graphapi-web" rel="nofollow noreferrer">https://github.com/Azure-Samples/active-directory-dotnet-graphapi-web</a>) demo from azure ad code samples in vs2015, rebuild the solution , but have 26 errors, i have tried update ADAL library to the newest version , but seems nothing happend , i haven't find similar error in issues in github issues,anything i missed ? Thanks for any help</p>