C# CRC16校验码 1.0

　　  /// <summary>

/// 计算CRC16校验码 1.0

/// </summary>

/// <param name="bytes">字节数组</param>

/// <param name="len">校验的长度</param>

/// <returns>校验码</returns>

public static int GetCRC(byte[] bytes, int len)

{

int CRC = 0x0000ffff;

int POLYNOMIAL = 0x0000a001;

int i, j;

for (i = 0; i < len; i++)

{

CRC ^= ((int)bytes[i] & 0x000000ff);

for (j = 0; j < 8; j++)

{

if ((CRC & 0x00000001) != 0)

{

CRC >>= 1;

CRC ^= POLYNOMIAL;

}

else

{

CRC >>= 1;

}

}

}

return CRC;

}