Net standard Library missing reference in ASP.NET Boilerplate

Question

every time i clone Abp.ModuleZero to my machine when i run nuget command update-database the error show me and when i build the solution in viusal studio the project doesn't build and show many errors in error list console window most of them is like :

The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'

i try to install Netstandard.library package from package manager console window but doesn't any sense.

my visual studio IDE version is 2015 Update 3.

Answer 1

ABP v3.0.0 is based on .NET Standard 2.0.

• This concerns you regardless if you are on MVC 5.x, .NET Framework 4.x or .NET Core 2.x.
• You should use VS2017 15.3.3+.
  • For VS2015, you may try installing NuGet client 3.6 or higher but that may no longer work.

i think downgrade to earlier version of this framework is good solution for me, where can i download early version of ABP framework like 2.3.4?

I don't see why you would download the framework, but it's on GitHub.

If you meant download a template that uses an earlier version of ABP:

• You can only choose the project version for premium startup templates.

• You can build your own from module-zero-core-template/releases/tag/v2.5.1.

  • You need to rename the files and folders yourself.