how to add some equla-valued elements to the jagged part of a jagged array in c#: Ineed your Help

thanks alot

You are really good at C#

Unless you have a lot of other very large objects in your application, I can't see why you should have a memory problem here as (assuming the jagged array is of type int), you're only going to need at most 76 x 150 x 140 x 4 = 6,384,000 bytes of memory to store it.

Using an ArrayList or List wouldn't help as these collections use an 'ordinary' array of the appropriate size as their backup store.

I'd stick to the approach you've been using by copying the 'jagged' portion to a new and bigger array and then assigning it back. The code should be something like this:

        for (int i = 0; i < 76; i++)
        {
           for(int j = 0; j < 150; j++)
           {
              int originalLength = A[i,j].Length; // max 140
              // all elements of  Bij zero by default
              int[] Bij = new int[originalLength + 10]; // max 150
              // copy previous elements to Bij
              Array.Copy(A[i,j], 0, Bij, 5, originalLength); 
              // set A[i,j] to Bij
              A[i,j] = Bij;
           }
        }