Matrix size????

Are you talking about the System.Drawing.Drawing2D.Matrix class? Though I've never used it, the help says that this matrix is always 3 by 3. If you're talking about a jagged array, you can use the .Length property of any of the subarray objects to determine the number of elements in that dimension. If you're talking about a multidimensional array, you can use its GetUpperBound and GetLowerBound methods to determine how many elements are in each dimension. These methods take a dimension parameter.