http://forums.lhotka.net/search/SearchResults.aspx?s=5&o=DateDescending&tag=virtual+method&orTags=0Search results matching tag 'virtual method'en-USCommunityServer 2008.5 SP3 (Build: 36.8414)http://forums.lhotka.net/forums/p/11356/52738.aspx#52738Mon, 14 May 2012 04:40:44 GMT49a2225a-bd1e-4c5d-a665-720b81e87ca9:52738foxhard<p>Hi,</p> <p>I have see several examples of implementation of ReadOnlyList classes. But the fetch method is like this:</p> <p>private void DataPortal_Fetch(SomeCriteriaClass criteria)</p> <p>{...}</p> <p>But, if inside ReadOnlyListBase there is the method:&nbsp;&quot;protected virtual void DataPortal_Fetch(object criteria)&quot; . Is there some performance issue if I use override method inside my inplementation like this:</p> <p>protected override DataPortal_Fetch(object criteria)</p> <p>{&nbsp;</p> <p>&nbsp; &nbsp; &nbsp;SomeCriteriaClass someCriteria = (SomeCriteriaClass)criteria;</p> <p>}</p> <p>&nbsp;</p>