Use of groupby method in list

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i want to apply groupby() on list
example
Suppose i var a list =>

List<class> Lst= new list();
List<class> Lst1= new list();
and i load data
Lst= (
// code here

).tolist();

and now

lst1= lst.groupby(x => x.name).tolist();

i want to load item in lst1 but it gives erro

Posted 15-May-13 9:36am

maheshbisht

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Richard C Bishop 15-May-13 15:38pm

What error might that be?

maheshbisht 15-May-13 15:49pm

at groupby line(At last) it gives conversion error into a list

Richard C Bishop 15-May-13 15:54pm

What is the error?

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debkumar@codeproject · Answer 1 · 2013-05-15T09:55:00

When you are grouping something, you are suppose to get groups which are divided based on some criteria (in your case, it is name). Now in each there could be one or more elements. You may calculate come aggregate function on each group such as MAX, COUNT, AVERAGE etc.

Here you did not do any of the possible operation on groups. Problem is on the second part, i.e.

C#

lst1= lst.groupby(x => x.name).tolist();

You may check the typical usage of group clause in the following link.

http://code.msdn.microsoft.com/LINQ-to-DataSets-Grouping-c62703ea[^]