Migration Problem from 9.3 to 10

[ParasPant]

Hi,
I am new to ArcGis platform, and when I am migrating the old code in ArcGis 9.3 to ArcGis 10. I am sucessfull in building the code in C#, but I get error in registration, I use ESRIRegAsm.exe to register the *.dll file, but get error, I have attaced the error dialogue box. Could any one suggest me what may be the possbile problems,

Thanks in advance

😞

[MichaelRobb]

This was discussed at the Dev Summit.

Creating the buttons and toolbars etc is now done with XML, no longer do you create an extension, Implementing IToolbarDef, doing component category registration, creating Item defs etc.

Its a bit of migration involved.  You need SDK.  There is a basic wizard available as well, and detail if written or extended in the .xml file.
I would look at the config.xml file.