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If you do not have any problem, that does not mean there is no Problem.
This is the bug after Tag cloud bug.
Sequence contains more than one matching element
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code
Exception Details: System.InvalidOperationException: Sequence contains more than one matching element
Source Error:
Line 145: else
Line 146: preArticle.Groups = groups;
Line 147: preArticle = articles.Single(a => a.ArticleId == ga.ArticleId);
Line 148: groups = new List<Group>();
Line 149: }
Source File: d:\AcrEStore_4.0\Web\View\ArticleListControl.ascx.cs Line: 147
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