Assign Null value to the Integer Column in the DataTable

Question

I have a datatable with One ColumnName \"CustomerID\" with Integer DataType. Dynamically I want to add rows to the DataTable. For that, I had created one DataRow object like:

Answer 1

 if (TextBox1.Text.Trim() == String.Empty)
    {
        DR["CustomerID"] = null;
    }
    else
    {
        DR["CustomerID"] = Convert.ToInt32(TextBox1.Text);
    }