C# 数据类型转化为byte数组

public byte[] ShortToByte(short value)
    {
        return BitConverter.GetBytes(value);
    }
    public short ByteToShort(byte[] arr)
    {
        return BitConverter.ToInt16(arr,0);
    }

public byte[] StringToByte(string value)
{
    return  Encoding.UTF8.GetBytes(value);
    //return Text.Encoding.Default.GetBytes (value);
}
public string ByteToString(byte[] arr)
{
    return Encoding.UTF8.GetString(arr);
    //return Text.Encoding.UTF8.GetString (arr, 0, arr.Length);
}

public byte[] IntToByte(short value)
   {
       return BitConverter.GetBytes(value);
   }
    public int ByteToInt(byte[] arr)
   {
       return BitConverter.ToInt32(arr,0);
   }