Collection was modified; enumeration operation may not execute...... at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at GyldendalCore.Managers.AuthorManager.GetByName(String authorName)
at GyldendalCore.HelperUtil.GetCurrentAuthor()
at GyldendalCore.CodeBehind.Html_Main.AddMetaKeywords(String templateName)
at GyldendalCore.CodeBehind.Html_Main.Page_Load(Object sender, EventArgs e)....
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