textbox to array declaration

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C#

Windows

C#4.0

form

Hi I’m fairly new to c# programming so please bear with me. I’m currently working on a “simple” little program which allows the user to enter 25 values into the same text box and once this has been done I want to be able to display this 25 values in a list box as an array of 5 row by 5 column and i want to find out the largest number in the array.

private void button1_Click(object sender, EventArgs e)
{
    int arrayrows = 5;
    int arraycolomns = 5;
    int[,] arraytimes;
    arraytimes = new int[array rows, array columns];


    // list_Matrix.Items.Add(tb_First.Text);
    for (int i = 0; i != 5; i++)
    {
        for (int j = 0; j != 5; j++)
        {
           array times [i,j]= Convert. To String(Tb_First.Text);
            list_Matrix.Items.Add(array times[i, j].To String());

        }

    }
}

this is what i tried for displaying the array in a list box. but it isn't working.. since i dont find this i cant move to next section of finding the largest number among them. Any help will be much appreciated as i have hit a brick wall

Cheers