/// <summary>
 /// validacion solo letras
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void txtNuevo_KeyPress(object sender, KeyPressEventArgs e)
 {
     Validar.soloLetra(e);
 }
 /// <summary>
 /// valida solo letras
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void cmbColor_KeyPress(object sender, KeyPressEventArgs e)
 {
     Validar.soloLetra(e);
 }
 /// <summary>
 /// validacion sono letras
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void txtApellido_KeyPress_1(object sender, KeyPressEventArgs e)
 {
     Validar.soloLetra(e);
 }
 private void txtNombreApellidoUsuario_KeyPress(object sender, KeyPressEventArgs e)
 {
     Validar.soloLetra(e);
 }