c# - How to call method from all opened forms -

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I want to call a method in all open forms

this call call MyUpdateFnc () last Csutomer Open Form: 

  if (application.OpenForms ["frmCustomer"] = faucet) {(application.from ["frmCustomer"] as frmCustomer). MyUpdateFnc (); }   
 Many forms may be open.   
 
 
 You can get the  Application.OpenForms.OfType & lt; T & gt; By using the  method, all the types of type you want. After this you have to run again through the form collection. For example, use the  foreach  loop as follows:  
  foreach (application in frmCustomer frm. OpenForms.OfType & lt; frmCustomer & gt; ()) Frm.MyUpdateFnc ();

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