Question

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Hi,

As you can see on the picture above i have a List ‘keys’ filled with Request.Form.AllKeys which a key starts with ‘txt’.

I want to group them by their last id, for example

[0] 'txtTitle:2' 'txtDescription:2' [1] 'txtTitle:3' 'txtDescription:3' 

How can i achive this with lambda expression.

Thank you very much

Answer 1

var groups = keys.GroupBy(e=>e.Split(':').Last());