C#

using System.Collections.Generic;
...
List< Person > persons = new List< Person >();
persons.Add(somePerson);
persons.Add(5); // compile-time error: persons can only contain Person objects. This is something ArrayList will NOT give you, hence the benefit of using List

public struct MyStruct
{
   public int x;
   public int y;
   public float z;
}

IntPtr p;
MyStruct s;
int size;
byte[] buffer;

s = new MyStruct();

s.x = 1;
s.y = 2;
s.z = 3.0f;

size = sizeof( typeof( MyStruct ) );

p = Marshal.AllocHGlobal( size );

Marshal.PtrToStructure( s, p, true );
buffer = new byte[ size ];

Marshal.Copy( p, buffer, 0, size );

Marshal.FreeHGlobal( p );

<br />
		public int Encode( int i32Value, ref byte[] pdu, int off )<br />
		{<br />
			byte[] byte32Int = new byte[ cBytesPerWord32 ];<br />
			int netValue = System.Net.IPAddress.HostToNetworkOrder( i32Value );<br />
			byte32Int = BitConverter.GetBytes( netValue );<br />
			Array.Copy( byte32Int, 0, pdu, off, cBytesPerWord32 );<br />
			return cBytesPerWord32;<br />
		}<br />
<br />
		public int Decode( ref byte[] pdu, int off, ref uint u32Value )<br />
		{<br />
			uint netValue = BitConverter.ToUInt32( pdu, off );<br />
			u32Value = (uint)System.Net.IPAddress.NetworkToHostOrder( (int) netValue );<br />
			return cBytesPerWord32;<br />
		}<br />