Problem in adding a new row in a datatable

Hello There !,

First of all i have a datatable and i already have 4 entries in 4 rows namely from row 0 to row 4.

Now i just want to add a fifth entry in the fifth row

My Code is,

int var = Table2.Rows.Count;
int tot =Table2.Rows.Count +ListBox1.Items.Count;

for (int m = Table2.Rows.Count; m <= tot; m++)
{


Table2.Rows.Add(m);

Table2.Rows[m]["Documents"] = txtdoc.Text;

Table2.Rows[m]["Remove"] = "Remove";
}

This code gives me an error Saying there is no row at position no 5 even though
i have added a new row at position number 5


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