Question

IEnumerable<MyType> list = new List<MyType>{
    new{Num=0, Text="ABC"},
    new{Num=0, text="DEF"},
    new{Num=0, text="GHI"} }

I need to get element index in Num field:

IEnumerable<MyType> result = new List<MyType>{
    new{Num=1, Text="ABC"},
    new{Num=2, text="DEF"},
    new{Num=3, text="GHI"} }

Is it possible to do it with some LINQ-based construction?

Answer 1

var result = list.Select(
    (element, index) => new MyType { Num = index + 1, Text = element.Text }
);