C# ResizeEx, Resizes Either a Onedimensional or Multidimensional Array to a Specified New Size.

ResizeEx.cs

public class ResizeEx
    {
        /// <summary>
        ///     Resizes a one-dimensional array to the specified new size.
        /// </summary>
        public static void Resize<T>(ref T[] array, int newSize)
        {
            if(newSize <= 0)
                throw new ArgumentOutOfRangeException($@"New Size {newSize} must be greater than 0.");
            if(array == null)
            {
                array = new T[newSize];
            }
            else
            {
                if(array.Length == newSize)
                    return;
                var tArray = new T[newSize];
                Array.Copy(array, 0, tArray, 0, array.Length);
                array = tArray;
            }
        }
        /// <summary>
        ///     Resizes a multidimensional array to the specified new size.
        /// </summary>
        public static void Resize2D<T>(ref T[,] array, int nX, int nY)
        {
            if(nX <= 0 || nY <= 0)
                throw new ArgumentOutOfRangeException($@"New Size of Columns:{nX} and Rows:{nY} must be greater than 0.");
            if(array == null)
            {
                array = new T[nX, nY];
            }
            else
            {
                var newArray = new T[nX, nY];
                var mX       = Math.Min(array.GetLength(0), newArray.GetLength(0));
                var mY       = Math.Min(array.GetLength(1), newArray.GetLength(1));
                for(var i = 0; i < mX; ++i)
                    Array.Copy(array, i * mY, newArray, i * nY, mY);
                array = newArray;
            }
        }
    }