Array.Copy

var bt = new byte[] { 0x03, 0x00, 0x01, 0xD9, 0x23 };
               var result = new byte[] { 0x01, 0x00, 0x03, 0x00, 0xFC };
               var tmp = new byte[5];
               _sp.Write(bt, 0, bt.Length);
               Thread.Sleep(500);
               var recive = new byte[_sp.BytesToRead];
               _sp.Read(recive, 0, _sp.BytesToRead);
               Array.Copy(recive, 6, tmp, 0, 5);
               return CompareArray(tmp, result);

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Array.Copy

原文：http://www.cnblogs.com/zhangwei595806165/p/3811927.html