// CS0411: The type arguments for method `System.Linq.Enumerable.OrderBy(this System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try specifying the type arguments explicitly // Line: 20 using System.Collections.Generic; using System.Linq; public class C { public string Name () { return "aa"; } } class Z { void Test () { List l = null; var r = l.OrderBy (f => f.Name).ToList (); } }