c# resize multidimensional array
void ResizeArray<T>(ref T[,] original, int newCoNum, int newRoNum)
{
var newArray = new T[newCoNum,newRoNum];
int columnCount = original.GetLength(1);
int columnCount2 = newRoNum;
int columns = original.GetUpperBound(0);
for (int co = 0; co <= columns; co++)
Array.Copy(original, co * columnCount, newArray, co * columnCount2, columnCount);
original = newArray;
}