blockCopyReshape.cs

using System;
using System.Linq;
namespace ConsoleApplication
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var ary = new int[]{1,2,4,5,3,4,7,16,2,4,9,1,6,3,0,2};
            var mat = new int[4,4];
            Buffer.BlockCopy(ary, 0, mat, 0, ary.Length * sizeof(int));
            foreach(var i in Enumerable.Range(0,4))
            {
                foreach(var j in Enumerable.Range(0,4))
                {
                    Console.Write("{0,-8}",mat[i,j]);
                }
                Console.Write("\n");
            }
        }
    }
}