arrays - Trying to convert an int[] into int[,] using C# -

i function convert single dimension array int[480000] 2d array of size int[800,600]. can please me how can done?

public static t[,] convert<t>(this t[] source, int rows, int columns) {   int = 0;   t[,] result = new t[rows, columns];    (int row = 0; row < rows; row++)     (int col = 0; col < columns; col++)       result[row, col] = source[i++];   return result; }