/// <summary>
/// Singleton
/// </summary>
/// <returns></returns>
public static FormKNeighbours Instance()
{
if (instance == null)
{
instance = new FormKNeighbours();
}
return(instance);
}
/// <summary>
/// cerrar el singleton, volvemos a poner la instancia a nula
/// </summary>
/// <param name="e"></param>
protected override void OnClosed(EventArgs e)
{
instance = null;
}