The type 'ESRI.ArcGIS.ADF.CATIDs.MxCommands' exists in both 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.Local.dll' and 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.dll' c:\documents and settings\spilli\my documents\visual studio 2010\Projects\Updating_Attributes\Updating_Attributes\Updating.cs
Error 2.
The type 'ESRI.ArcGIS.ADF.CATIDs.MxCommands' exists in both 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.Local.dll' and 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.dll' c:\documents and settings\spilli\my documents\visual studio 2010\Projects\Updating_Attributes\Updating_Attributes\Updating.cs
Error 3 The type 'ESRI.ArcGIS.ADF.BaseClasses.BaseCommand' exists in both 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.Local.dll' and 'C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ADF.dll' c:\documents and settings\spilli\my documents\visual studio 2010\Projects\Updating_Attributes\Updating_Attributes\Updating.cs
The reason is you have referenced library twice... so please go to your bin folder...there you find the two referenced dll...you just remove one...thats works fine...