I've created a sql server database in the App_Data folder and a new class library DLL. In this DLL, I've tried adding an ADO.NET Entity Framework Model based on said database, but when I click to finish in the wizard I get the following error:

"Method 'validate' in type "NuGet.manifestmetadata" from assembly NuGet.core ... does not have an implementation"

Anyone know how I can sort this?