/// <summary>        

/// 獲取.net版本       

 /// </summary>        

/// <returns></returns>        

public string[] GetDotNetVersions()        

{            

DirectoryInfo[] directories = new DirectoryInfo(Environment.SystemDirectory + @"..Microsoft.NETFramework").GetDirectories("v?.?.*");           

 ArrayList list = new ArrayList();   

         foreach (DirectoryInfo info2 in directories)         

   {               

 list.Add(info2.Name.Substring(1));           

 }           

 return (list.ToArray(typeof(string)) as string[]);     

   }