Sorry for the triple post (no edit function ?), but I found the solution :

var result = from aum in aumList where aum.Date == aDate select new { aum.AUMPart, aum.CodeShare };
foreach (var item in result.ToList())
{
pie.Add(item.AUMPart, item.CodeShare);
}

Thanks =)

Just one more little question.
How can I add the ID corresponding to my Product in the Chart Legend ?

Thank you.

Hi Sandra,

Your recommendation was very helpful and solved my problem.
Thank you very much =)

Best regards.

Hi Sandra,

Here's the simple project I created for you. It's a little simplistic but it's more or less what I've done in my real project.

Thank you.

Hi Sandra, Thank you for the answer. I tried to follow your advices but nothing is displaying in the chart. Here's the code I used : foreach (List<AUM> item in aListOfAumLists) { pie.Add(from aum in item where aum.Date == aDate select aum.AUMPart); } Is there a problem with it or am I misunderstandi...

Hi, I have a little problem of understanding with the Pie Chart. I'll try to describe my problem with an example : 1°) I have one product which contains several properties which have a particular value in a specific date 2°) My ProductValueDateList contains one product's values for several date 3°) ...