C# ToDictionary lambda select index and element?

Question

I have a string like string strn = \"abcdefghjiklmnopqrstuvwxyz\" and want a dictionary like:

Dictionary(){
    {\'a\',0},
    {         


        

Answer 1

Use the .Select operator first:

strn
    .Select((x, i) => new { Item = x, Index = i })
    .ToDictionary(x => x.Item, x => x.Index);