public static IEnumerable <TargetFramework> GetNetStandardTargetFrameworks()
        {
            if (DotNetCoreRuntime.IsNetCore20Installed())
            {
                yield return(CreateTargetFramework(".NETStandard", "2.0"));
            }

            if (DotNetCoreRuntime.IsNetCore20Installed() || DotNetCoreRuntime.IsNetCore1xInstalled())
            {
                foreach (var targetFramework in GetTargetFrameworksVersion1x(".NETStandard", HighestNetStandard1xMinorVersionSupported).Reverse())
                {
                    yield return(targetFramework);
                }
            }
        }