c# - Convert List to T item if there is only one element? -

I have a list with an encoded I want to get the first element if and only then N = 1. Can it be done using lambda or some good build?

This works, but looks awesome:

  var blah = new list & lt; Object & gt; () {New object ()}; Var item = (blah.Count == 1? Blah [0]: zero);    
 
 
 There are several LINQ extension methods.  
 
  
 If there is one element then an element exists, if any  default  will be returned, then returned it  
 If any  default   
 returns the element in the given position or  default ; T & gt;  will be returned, if there are not many elements in the sequence will be returned   
 for example (I have liked it for my own need):  
  var item = blah.ElementAtOrDefault (0);   
 
 The best way to get your requirement depends on how strong this rule is:  
 
 I want to get the first element if only If = 1   
 If it is  extraordinary  that contains more than one element in the sequence, then use  SingleOrDefault  and you will be notified (error Log) if it gets out of hand.  
 If it is important that you get  first element  and you never want another element, better  use first and default  because It has a meaningful name.  
 If the element's  index  is important in the sequence and you (at present) need the first element, but it can change in future,  ElementAtOrDefault  Use.