Exception: Collection was modified; enumeration operation may not execute.

jf — Wed, 28 May 2008 03:00:37 +0000

It’s been a while that i didn’t get this Exception, while working, and yesterday, while I was performing some test on a new module that I implemented i got this exception. I knew i did get it sometimes back last year, and managed to solve it. So here is one solution when you are dealing with this kind of issue:


IList productList = new List();
productList.Add(new Product("Some product 1");
productList.Add(new Product("Some product 2");
productList.Add(new Product("Some product 3");
productList.Add(new Product("Some product 4");


for(int i=(productList.Count -1); i >= 0; i--)
{
//Perform Edit, Update, Delete Operation using for .. i loop in reverse order
}

There is a list of other solutions that can be found on the following websites:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=372532&SiteID=1
http://forums.asp.net/p/1147145/1861164.aspx
http://www.experts-exchange.com/Programming/Programming_Languages/Dot_Net/ASP_DOT_NET/Q_21585534.html

Wacdesigns » Exception

Exception: Collection was modified; enumeration operation may not execute.