获取.net框架的安装目录

        方法一：        string frameworkInstallDir = System.Runtime.InteropServices.RuntimeEnvironment.GetRuntimeDirectory();

        方法二：        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             string path = System.IO.Path.Combine(installRoot, version);            if (path.EndsWith("\\"))            {                return path;            }            else            {                return path + "\\";            }        }