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Editorial Team
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Asked: 2026-06-15T12:10:54+00:00

I have a C# website running in IIS. I have few .cs files under

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I have a C# website running in IIS. I have few .cs files under the directory App_code. I am able to refer them in all *.aspx.cs and *.ascx.cs files. I do not have Visual studio and I need to make my changes manually.

I now need to consume a web service in .aspx.cs file. I generated a proxy class using wsdl.exe and placed it under App_code directory. But I am not able to refer to the file in my aspx.cs file. I get the error

Compiler Error Message: CS0246: The type or namespace name ‘TestSearchProxy’ could not be found (are you missing a using directive or an assembly reference?)

The proxy doesnt have any namespace defined and I am assuming that it is the default namespace. I haven’t added any “using *” in the aspx.cs fiile.

Can someone help me on how to resolve this issue?

Another approach I tried is :

I generated a dll from the proxy file using csc command and placed the dll under bin directory. I am still unable to access the proxy class.

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1 Answer

  1. Editorial Team

    about the first attempt:

    • Check the namespace of the TestSearchProxy and use it explicitly: NameSpace.TestSearchProxy
    • If that doesn’t work try removing the namespace from the Generated proxy code.
    • Try wiping the asp.net temp directory, this will make it recompile the app_code directory from scratch. (which is usually the first thing you try since the IIS hot deploy mechanism is a bit flaky)
      1. stop the IIS service
      2. DEL /S “C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files*.*”
    • check for compilation errors in the proxy code, especially if the wsdl.exe you used might be from a newer framework version than the IIS/.net framework deployed in the target platform.

    About the second attempt, (putting the dll in the bin directory):

    • You will need to add a reference to it, you can do that from the web.config file in the root directory of your aspx website:

      <assemblies>

      <add assembly=”AssemblyName , Version=1.0.0.0, Culture=neutral, PublicKeyToken=123456789ABCD1″/>

      </assemblies>

      Or just by adding it to the GAC (gacutil -i dllname.dll).

    • You should also check that that the dll was compiled with the correct version of .net, and in the correct architecture (x86/x64) to avoid conflicts since this might be an old system (No 4.0 clr/ 32bit only).

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