IComparer using Lambda Expression
- by josephj1989
class p {
public string Name { get; set; }
public int Age { get; set; }
};
static List<p> ll = new List<p>
{
new p{Name="Jabc",Age=53},new p{Name="Mdef",Age=20},
new p{Name="Exab",Age=45},new p{Name="G123",Age=19}
};
protected static void SortList()
{
IComparer<p> mycomp = (x, y) => x.Name.CompareTo(y.Name); <==(Line 1)
ll.Sort((x, y) => x.Name.CompareTo(y.Name));<==(Line 2)
}
Here the List.sort expects an IComparer<p> as a parameter. And it works with the lambda as shown in Line 2. But when I try to do as in Line 1, I get an error:
Cannot convert lambda expression to type System.Collections.Generic.IComparer' because it is not a delegate type
I investigated this for quite some time but I still don't understand it. Maybe my understanding of IComparer is not quite good.
