c# syntax and Linq, IQueryable
- by hdiver
Hello. This is a question about the SYNTAX of c# and NOT about how we call/use IQueryable
Can someone please explain to me:
We have this declaration (System.Linq):
public static double Average<TSource>(this IQueryable<TSource> source,
Expression<Func<TSource, int>> selector)
and to call the Average
double average = fruits.AsQueryable().Average(s => s.Length);
I understand how to call the Average and all the similar static method of IQueryable
but I don’t understand the syntax of the declaration.
public static double Average<TSource>(this IQueryable<TSource> source,
Expression<Func<TSource, int>> selector)
What does the <TSource> mean in Average<TSource>(
and also the this IQueryable<TSource> source.
since only one parameter passes when we call it and the actual lamda expression (s => s.Length);
Thanks in advance.
