[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]  
  public struct DOT11_SSID         {           
              public uint uSSIDLength;
             [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string ucSSID;      
   }


需要让CharSet = CharSet.Unicode  改为 ->   charset = charset.ansi;但是

using System;
namespace System.Runtime.InteropServices
{   
        public enum CharSet     {
               Unicode = 3,
               Auto = 4,
       }
}

不包含  怎么办？？

Ansi = 2,

问题已解决