Have you ever used Buffer and/or BitConverter?

[Nathan Ridley]

The last line of code below crashes my program. I am stumped as to why it's happening. I've double and triple checked the definitions for the BlockCopy and GetBytes functions and I still can't work out what I'm doing wrong. Any insight would be appreciated.

namespace ConsoleApplication1
{
  class Class1
  {
    [STAThread]
    static void Main(string[] args)
    {
      int int1 = 3;
      int int2 = 1000;
      byte[] b = new byte[16];
      Buffer.BlockCopy(BitConverter.GetBytes(int1), 0, b, 0, 8);
      //the following line crashes the program
      Buffer.BlockCopy(BitConverter.GetBytes(int2), 0, b, 12, 4);
    }
  }
}

NATHAN RIDLEY Web Application Developer email: nathan @ netlab.com.au [remove the spaces before and after the @ symbol]

[Nick Parker]

Try the following:

using System;

namespace ConsoleApplication1
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
int int1 = 3;
int int2 = 1000;
byte[] b = new byte[16];
byte[] b2 = BitConverter.GetBytes(int1);
byte[] b3 = BitConverter.GetBytes(int2);
Buffer.BlockCopy(b2, 0, b, 0, b2.Length);
Buffer.BlockCopy(b3, 0, b, 12, 4);
}
}
}

- Nick Parker
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[Jeff Varszegi]

It's a weird problem, eh? The length of both arrays returned from GetBytes() is 4, so I think that it's actually the second-to-last line that's causing the problem with its length of 8. That code must be badly written in the current version of .NET: the second-to-last line above leaves the static stuff in Buffer somehow in an incorrect state, which is exposed by the subsequent call. Sorry I can't be of more help. Regards, Jeff Varszegi