C# Declare variable in lambda expression

Question

I want to do a simple lambda expression like this:

IList list = GetSomeList();

MyEntity1 result = list.SingleOrDefault(         


        

Answer 1

Well, first off, are you trying to use this in linq to sql / entity framework / other?

If not, then just do this

list.SingleOrDefault(e => {
   var entity = GetMyEntity2(e);

   return entity != null && entity.Id != null && entity.Id > 0;
});