/// <summary>
 /// //////////////
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void button1_Click(object sender, EventArgs e)
 {
     if (textBox1.Text.Length > 0)
     {
         try
         {
             dbsql.AddNewCurrency(textBox1.Text);
             dataGridView1.DataSource = dbsql.GetAllCurrency();
             textBox1.Text            = "";
             textBox1.Focus();
         }
         catch (Exception ex)
         {
             MessageBox.Show(ex.Message);
         }
     }
 }