Convert multidimensional array to jagged array in C#

Question

I have a C# WCF webservice which is called by two VB 6 project. The target VB project is sending to the client VB project a multidimensional array.

I want to convert

Answer 1

By default, the C# produces the 0-based array. I have fine-tuned Pedro's solution as below:

internal static class ExtensionMethods
{
    internal static T[][] ToJaggedArray(this T[,] twoDimensionalArray)
    {
        int rowsFirstIndex = twoDimensionalArray.GetLowerBound(0);
        int rowsLastIndex = twoDimensionalArray.GetUpperBound(0);
        int numberOfRows = rowsLastIndex - rowsFirstIndex + 1;

        int columnsFirstIndex = twoDimensionalArray.GetLowerBound(1);
        int columnsLastIndex = twoDimensionalArray.GetUpperBound(1);
        int numberOfColumns = columnsLastIndex - columnsFirstIndex + 1;

        T[][] jaggedArray = new T[numberOfRows][];
        for (int i = 0; i < numberOfRows; i++)
        {
            jaggedArray[i] = new T[numberOfColumns];

            for (int j = 0; j < numberOfColumns; j++)
            {
                jaggedArray[i][j] = twoDimensionalArray[i + rowsFirstIndex, j + columnsFirstIndex];
            }
        }
        return jaggedArray;
    }
}