Duplicate type 'master' found in assembly

Question

Previously, we were on .net 2.0 and aspnet_merge build was working fine. Now after upgrading to .net 4.0, when we are trying to build our code using aspnet_merge, it throws following error

Duplicate type 'master' found in assembly.

It is a master page and I have throughly checked for duplicacy and there is none..

Plz suggest..

Answer 1

take help from here -
http://dreamlusion.wordpress.com/2008/07/06/an-error-occurred-when-merging-assemblies-access-to-the-path-is-denied/

http://www.codeproject.com/Articles/9364/Merging-NET-assemblies-using-ILMerge

Answer 2

I had a similar issue in VS 2012 with 2 aspx files:

• Foo_Bar.aspx
• Foo/Bar.aspx

What fixed it for me was to check off Precompile during publishing. As the screenshot shows, it is set not to merge:

If you still have issues try renaming class in the code-behind (eg, from Foo_Bar to Foo_Bar_Old and update the aspx page tag to match: <%@ Page ... Inherits="Foo_Bar_Old" %>)