Marshal.Copy Method (Int32[], Int32, IntPtr, Int32)

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array. 
        int[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanged memory to hold the array. 
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array. 

            int[] managedArray2 = new int[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was coppied to unmanaged memory and back.");

        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }



    }

}