问获取.NET框架目录路径

EN

using Microsoft.Build.Utilities;
ToolLocationHelper.GetPathToDotNetFramework(
        TargetDotNetFrameworkVersion.VersionLatest);

using System;
using Microsoft.Win32;

public static string GetFrameworkDirectory()
{
  // This is the location of the .Net Framework Registry Key
  string framworkRegPath = @"Software\Microsoft\.NetFramework";

  // Get a non-writable key from the registry
  RegistryKey netFramework = Registry.LocalMachine.OpenSubKey(framworkRegPath, false);

  // Retrieve the install root path for the framework
  string installRoot = netFramework.GetValue("InstallRoot").ToString();

  // Retrieve the version of the framework executing this program
  string version = string.Format(@"v{0}.{1}.{2}\",
    Environment.Version.Major, 
    Environment.Version.Minor,
    Environment.Version.Build); 

  // Return the path of the framework
  return System.IO.Path.Combine(installRoot, version);     
}

internal static class DotNetFrameworkLocator
{
    public static string GetInstallationLocation()
    {
        const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";
        using (var ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(subkey))
        {
            if (ndpKey == null)
                throw new Exception();

            var value = ndpKey.GetValue("InstallPath") as string;
            if (value != null)
                return value;
            else
                throw new Exception();
        }
    }
}