int[] i = new int[64];
byte[] bytes = new byte[ i.Length * 4 ];


GCHandle gch = GCHandle.Alloc(i, GCHandleType.Pinned);
Marshal.Copy(gch.AddrOfPinnedObject(), bytes, 0, bytes.Length);   //<-- 反之亦然
gch.Free();

------解决方案--------------------
BitConverter.ToInt32

------解决方案--------------------
BitConverter.GetBytes


------解决方案--------------------
Buffer.BlockCopy

------解决方案--------------------
探讨

Buffer.BlockCopy


------解决方案--------------------
好像可用的方法都让你们说完了

------解决方案--------------------
//uint to byte[]
public static byte[] WriteUint(uint nValue)
       {
           byte[] bArray = new byte[4];
           bArray[3] = (byte)(nValue & 0xFF);
           bArray[2] = (byte)((nValue >> 8) & 0xFF);
           bArray[1] = (byte)((nValue >> 16) & 0xFF);
           bArray[0] = (byte)((nValue >> 24) & 0xFF);
           return bArray;
       }


//byte[] to uint
public uint ReadUint(byte[] a)
       {
           byte[] bArray = new byte[4];
           bArray = a;
           uint nValue = 0;
           nValue ^= bArray[0];
           nValue = nValue << 8;
           nValue ^= bArray[1];
           nValue = nValue << 8;
           nValue ^= bArray[2];
           nValue = nValue << 8;
           nValue ^= bArray[3];
           return nValue;
       }