c# - LINQ How to define a default type for use with ElementAtOrDefault Operator -

I like this type of ElementAtOrDefaultOperator to use with generic lists, but I can not understand this How to define a default type What I understand for my list of items, the default value can be zero if I have a list of the items below, but I return my version of my default object with the appropriate values Want to do Here's what I mean:

  class A {string field A; String field B; Class B field C; // constructor} list & lt; Class A & gt; MyObjects = New list & lt; ClassA & gt; (); MyObjects.Add (// new object) myObjects.Add (// new object)  

I want to be able to do the following:

  class A new object = myObjects.ElementAtOrDefault (3);  

And the new object is one of the primary types that I define elsewhere. I thought there might be a SetDefaultElement or any other method but I do not think it exists.

Any thoughts?

Just type your own extension method:

  Fixed T elements At or default & lt; T & gt; (This is iLIT & lt; T & gt; list, int index, T @ default) {return index & gt; = 0 & amp; Amp; Index & lt; List List [index]: @default; }  

and call:

  var items = myObjects.ElementAtOrDefault (3, defaultItem);  

Or if you want to be evaluated by default, then Func & lt; T & gt; Use :

  Fixed TiElementEyour Default & lt; T & gt; (This is iLIT & lt; T & gt; list, int index, funk & lt; T & gt; @default) {return index & gt; = 0 & amp; Amp; Index & lt; List List [index]: @ default (); }  

This form will allow you to use a pre-defined item (for example, for example), for example:

  var Item = myObjects Element atoffault (3, myObjects.First);  

Or more flexible:

  var items = myObjects.ElementAtOrDefault (3, () => myobject [2]);  

or

  var items = myObjects.ElementAtOrDefault (3, () => New MyObject {...});