使用NET Standard 1.X的Nuget包

Question

As a proof-of-concept, I would like to create a Nuget package that consists of a single assembly. This assembly is compiled using the brand new .NET Standard 1.X profile . My idea is to make it usable not only by .NET Core, but also from .NET 4.6.1 (full framework), or even older versions, but I don't know how.

For the moment, I created a nuspec file that looks like this:

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
  <metadata>

    <id>MyPackage</id>
    <description>MyPackage</description>

    <version>X.X.X.X</version>
    <authors>JMN</authors>
    <owners>JMN</owners>
    <licenseUrl>http://opensource.org/licenses/Apache-2.0</licenseUrl>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>

  </metadata>

  <files>
    <file src="bin\Release\MyLib.dll" target="lib\netstandard1.X\MyLib.dll" />
  </files>

</package>

The problem is that, when adding the package to a project that targets .NET Framework 4.6.1, it says this message (output window)

Could not install package 'MyLib XXXX'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.6.1', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

What should I do to make my nuget package usable for both Frameworks (at least both .NET Standard 1.X and .NET Framework 4.6.1).

Answer 1

You don't need your own nuspec at all.

Simply create an RC 2 project.json and then use dotnet pack to generate a NuGet package.

http://dotnet.github.io/docs/core-concepts/libraries/libraries-with-cli.html

You cannot expect older versions of .NET Framework to support such package, as .NET Standard 1.5 is too high a version.