Switching to new ‘dotnet’ target framework monikers

[Eilon]

What is it?

These are a new, simpler way of targeting versions of .NET. More information here https://github.com/dotnet/corefx/blob/master/Documentation/project-docs/standard-platform.md

Action required

For RC1 applications and test projects should still target dnx4x and dnxcore50 and don't need to change at all. Anything that has a Program.Main or Startup.cs is considered an application.

Only _class libraries_ should change to target net4x and dotnet5.x. For class libraries the recommended conversion steps are:

In project.json:

• Change dnx4x to net4x (e.g. dnx451 to net451)
• Change dnxcore50 to dotnet5.4

And in your CS files:

• Change #if DNX451 to #if NET451
• Change #if DNXCORE50 to #if DOTNET5_4

Example

Here's what a project.json file used to look like:

{
  "version": "1.0.0-*",

  "frameworks": {
    "dnx451": { },
    "dnxcore50": {
      "dependencies": {
        "System.Collections": "4.0.11-beta-*"
      }
    }
  }
}

And here's what to change it to:

{
  "version": "1.0.0-*",

  "frameworks": {
    "net451": {},
    "dotnet5.4": {
      "dependencies": {
        "System.Collections": "4.0.11-beta-*"
      }
    }
  }
}

And in your CS files if you had:

#if DNX451
        // whatever 
#endif 
...
#if DNXCORE50
        // whatever 
#endif 

Change that to:

#if NET451
        // whatever 
#endif 
...
#if DOTNET5_4
        // whatever 
#endif