VS 2005 Web Application Projects

Re: The type '' exists in both '' and ''

tchimev — Wed, 25 Nov 2009 07:12:03 GMT

The problem for me was that I had both CodeBehind and Src in my Page directive.

Thank you.

Re: The type '' exists in both '' and ''

buehlej1 — Fri, 20 Nov 2009 16:43:38 GMT

Well, I may throw yet another answer to this error. I don't think this is quite the same as others, but similar. I unfortunately named my Master page the same as an ASPX file that I had in the project. This caused them both to have the same class name. I renamed the master page (and class name within the master page) and all references to it in any other file and that took care of it for me. Thanks for all the suggestions though that led me in the right direction.

Re: The type '' exists in both '' and ''

domz — Wed, 19 Aug 2009 01:49:48 GMT

Thank you for documenting this, it was my problem and your tip saved me a lot of time.

Re: The type '' exists in both '' and ''

Hornwood509 — Fri, 31 Jul 2009 09:16:16 GMT

I also had this problem. In my case I had an extra reference in the Compilation>assemblies bit of my web.config file. Just removed the reference and it solved the problem.

The following link is suggested this fix to me http://dotnetfish.blogspot.com/2007/09/type-xxx-exists-in-both.html

Re: The type '' exists in both '' and ''

dwishard — Tue, 14 Jul 2009 12:57:18 GMT

I had the same issue. I had actually somehow got a copy of my Class.cs file in the Properties folder of another project. Not sure how it happened, but most likely a drag and drop mishap, or a cut and paste mishap. Once that was removed, all was well.

Re: The type '' exists in both '' and ''

katarukoti — Mon, 01 Jun 2009 14:13:47 GMT

when i want to publish website in vs 2005

i am getting the below one's

Error 1 e:\SMSPROD\DotnetCode\Registration.aspx(61): error CS0433: The type 'DotnetCode_usercontrols_Email' exists in both 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\smsprod\a3b2710a\74e825fa\App_Web_53uqcplx.dll' and 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\smsprod\a3b2710a\74e825fa\App_Web_aruiysdi.dll' E:\SMSPROD\DotnetCode\Attendence\AttendenceMonthly.aspx 1

Error 14 The type 'DotnetCode_usercontrols_Email' exists in both 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\smsprod\a3b2710a\74e825fa\App_Web_53uqcplx.dll' and 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\smsprod\a3b2710a\74e825fa\App_Web_aruiysdi.dll' E:\SMSPROD\DotnetCode\Registration.aspx 61

try to fix these issues

Regards

Koti

Re: The type '' exists in both '' and ''

katarukoti — Mon, 01 Jun 2009 14:09:38 GMT

when i want to publish website in vs 2005

i am getting the below one's

try to fix these issues

Regards

Koti

Re: The type '' exists in both '' and ''

Mike1298 — Fri, 10 Apr 2009 06:49:31 GMT

Thank you for your help. I changed "CiodeFile" to "CodeBehind" in my ".aspx" file and it took care of my problem.

Mike1298

Re: The type '' exists in both '' and ''

er-v — Wed, 04 Feb 2009 05:47:25 GMT

Thanks so much, tomtyf! The event handler been realy the key for me. I have a user control, that is very simple. It has a dropdown inside, and I provide SelectedIndexChanged event with the folowing way.

  public event EventHandler SelectedIndexChanged;
        protected void ddlLocation_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (SelectedIndexChanged != null)
            {
                SelectedIndexChanged(sender, e);
            }
        } 
I've started getting this 'The type '' exists in both '' and ''' error from time to time. 
After I've commented this code the problem gone.
This is definitly strange. By the way I'm using .net 3.5 sp1 and I don't use App_Code folder at all. This error been happening on ASP.NET development server, and after I publish it on IIS 7 and IIS 6.

Re: The type '' exists in both '' and ''

TheMidnightCoder — Tue, 14 Oct 2008 21:18:52 GMT

piyushnaik:

* You have a "CodeFile" page directive in the some page markup instead of "CodeBehind". (How? I don't know. Could be because of certain migration issues between 1.1 and 2.0. )

This was the problem for me. Actually, to be more specific, it was that I had BOTH a "CodeBehind" directive and a "CodeFile" directive in my page. As an added bit of information, I was in the process of "globalizing" this particular application and I had recently used the "Generate Local Resource" tool (off the Tools menu).

Perhaps it was in that process that the mysterious "CodeFile" directive showed up. Anyway, now it's working and I'm happy. Thank you piyushnaik!

Re: The type '' exists in both '' and ''

azote — Tue, 11 Mar 2008 16:53:14 GMT

thanks tomtyf......

I moved the delegate and event arg definitions into a seperate file and it solved the problem.

* crazy!

Re: The type '' exists in both '' and ''

loginprompt — Wed, 13 Feb 2008 22:18:25 GMT

I got this from having two referneces to the same dll. I included the dll by file name once (Browse tab), and then again via the project (Projects tab) that produced the dll. Removed one of the references and all was well.

Re: The type '' exists in both '' and ''

tomtyf — Fri, 01 Feb 2008 11:20:59 GMT

I got this message due to the fact that I had a user control firing an event that was being handled in the parent page.

I moved the delegate and event arg definitions into a seperate file and it solved the problem.

Re: The type '' exists in both '' and ''

piyushnaik — Fri, 20 Jul 2007 21:09:09 GMT

I want to document for the posterity that one could get this error even if you don't have an App_Code directory but if all of the following is true:

* You are using a Web Applications Project. (Perhaps you migrated from 1.1 like I did.)

* You are also using a Web Deployment Project.

* You have a "CodeFile" page directive in the some page markup instead of "CodeBehind". (How? I don't know. Could be because of certain migration issues between 1.1 and 2.0. )

In this scenario, when MSBuild compiles the wdproj file, it compiles this page into the <Project>_deploy.dll in addition to the regular <Project>.dll. This results in duplicate class names and hence the runtime error.

Re: The type '' exists in both '' and ''

JeremyThake — Mon, 10 Apr 2006 05:59:59 GMT

Thanks for the link, and for your time in helping me to fix this.

Keep up the amazing work!

Jeremy