public static CustomDialogForm GetInstance()
 {
     if (instance == null)
     {
         instance = new CustomDialogForm();
     }
     return(instance);
 }
 /// <summary>
 /// Clean up any resources being used.
 /// </summary>
 /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
 protected override void Dispose(bool disposing)
 {
     if (disposing && (components != null))
     {
         components.Dispose();
     }
     base.Dispose(disposing);
     instance = null;
 }