To address your issues more quickly, please open the issue in the most appropriate repository. These are some of the most common repos:

Common ASP.NET and Entity Framework repos and projects:

 - Documentation: https://github.com/aspnet/Docs
 - MVC: https://github.com/aspnet/Mvc
 - Entity Framework Core: https://github.com/aspnet/EntityFrameworkCore
 - Entity Framework 6: https://github.com/aspnet/EntityFramework6
 - SignalR: https://github.com/aspnet/SignalR
 - Docker with ASP.NET Core: https://github.com/aspnet/aspnet-docker
 - Microsoft.NET.Sdk.Web: https://github.com/aspnet/websdk
 - Kestrel HTTP Server: https://github.com/aspnet/KestrelHttpServer
 - ASP.NET Katana: https://github.com/aspnet/AspNetKatana
 - and more! See a full list here: https://github.com/aspnet
 - note: several repositories have migrated their issues tracker to this repo here

Other common projects:

 - .NET Core CLI and SDK: https://github.com/dotnet/core
 - .NET Core runtime: https://github.com/dotnet/coreclr
 - .NET Core libraries: https://github.com/dotnet/corefx
 - NuGet: https://github.com/NuGet/home
 - Visual Studio: https://developercommunity.visualstudio.com
 - Visual Studio Code: https://github.com/microsoft/vscode
 - Omnisharp (C# support for VS Code): https://github.com/omnisharp/omnisharp-vscode