private void txtName_Leave(object sender, EventArgs e)
 {
     this.txtName.Text = this.txtName.Text.Trim();
     if (this.Node.Text != this.txtName.Text)
     {
         if (Class15.smethod_50(this.Node, this.txtName.Text))
         {
             this.txtName.Text = this.Node.Text;
         }
         else
         {
             this.Node.Text = this.txtName.Text;
         }
     }
 }