安全的C#中将整数存入数组

这里所指的将整数存入数组在c++中使用指针是这样实现的

char buff[SIZE] = {0};
char *p = buff;
*(int *)p = 256;

上篇blog中提到了ruby的实现方式
下面是安全的C#的实现方式（C#在不安全的情况下也可以使用指针实现）：

        private void PutIntIntoBuffer(int num, byte[] buffer, int beginLen)
        {
            buffer[beginLen] = (byte)num;
            buffer[beginLen + 1] = (byte)(num >> 8);
            buffer[beginLen + 2] = (byte)(num >> 16);
            buffer[beginLen + 3] = (byte)(num >> 24);
        }

        private void PutShortIntoBuffer(short num, byte[] buffer, int beginLen)
        {
            buffer[beginLen] = (byte)num;
            buffer[beginLen + 1] = (byte)(num >> 8);
        }


        private int GetIntFromBuffer(byte[] buffer, int beginLen)
        {
            return (int)buffer[beginLen]
                | (int)buffer[beginLen+1] << 8
                | (int)buffer[beginLen+2] << 16
                | (int)buffer[beginLen+3] << 24;
        }

        private short GetShortFromBuffer(byte[] buffer, int beginLen)
        {
            return (short)((int)buffer[beginLen]
                | (int)buffer[beginLen+1] << 8);
        }