c# - Search through a list or an array for existing string -

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I need an array or list that will include the name that will add the user. I also need to do an investigation which will not allow the name to be added, if that name is already present, I know it should be very simple, but I can not find a solution.

I think if it can: 

  List.Contains (name))   
 Or:  
  if (array (name))   
 this It is as easy as that!  List   and  T []  both  IList & lt; T & gt;  Apply the interface with your method. Assuming that you are happy with an accurate match, of course. If you need some more complex, then I might use it from LINQ to  Any  for example:  
  if (array.Any (x => x .tartsWith (name))

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