Invalid anonymous type member declarator

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I'm trying to do a group by but i'm getting this error when doing so

Element.GroupBy(x => new { x.Select(y=>y.Id)}

Invalid anonymous type member declarator. Anonymous type members must be declared with a member assignment, simple name or member access

What I have tried:

<pre>Element.GroupBy(x => new { x.Select(y=>y.Id)}

Posted 4-Sep-20 13:37pm

Updated 4-Sep-20 19:45pm

v4

1 solution

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OriginalGriff · Answer 1 · 2020-09-04T19:46:00

That's because it has no idea what you are trying to do - there is no obvious grouping data there. Did you mean something like:

C#

myCollection.GroupBy(c => c.PropertyToGroupBy).Select(g => new(g.Key));

Posted 4-Sep-20 19:46pm

Updated 4-Sep-20 20:02pm

v2