c# - Func as input parameter -

I have the following method in C # with some parameters:

  public static void DeleteSingleItemInDataGrid (DataGrid DataGrid, String IDcolumnName, Func & lt; int & gt; afterCompletionMethod_ToRun)   
 I type the third parameter type to  Func & lt; Zero & gt;  But I can not do how can I do it?  
 In other words  My question is how can a method (or function  with zero result ) pass as a method parameter?   
 
 A representative refers to a method that returns "return"  zero  to  The name of the representative is also in the Action  .net language, and so on:  
 
   
 Then your method will sign it: < / P> 
 
 
 
 
 
 
 
 
 
 
  And not back  int , it will be:  
  public Nick Static Zero DeleteSingleItemInDataGrid (DataGrid DataGrid, String IDcolumnName, Action & lt; int & gt; End End Method Method) / Code>  
 This is a method adopted by taking a  int  parameter Does not return anything (aka "back"  zero ).  
 It also means that you can not create a general method which accepts methods that return some methods and some accept the methods to return only with one method, But the need to create surcharge by using  action , and  Func & lt; T & gt; .