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Editorial Team
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Asked: 2026-06-13T08:54:11+00:00

I am viewing code that I have found from here . When I open

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I am viewing code that I have found from here. When I open the downloaded source code project in vs12, everything works fine. But when I copy the class into my own project there is an error (red squiggly line) under

WIA.ImageFile image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatBMP, false);

All references have been added as far as I can tell. The error description is: “One or more types required to compile a dynamic expression cannot be found. Are you missing a reference?”

Any Idea why this is happening and how to fix it?

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1 Answer

  1. Editorial Team

    Where you have copy/pasted the code, make sure target .Net Framework for that project is 4.0 or above (4.5).

    EDIT

    You get this error when attempting to compile a solution that uses dynamic types in .NET.
    It’s highly unlikely your project is missing a reference to System.Core.dll if you are using Visual Studio. Usually this occurs when the project does not have a reference to Microsoft.CSharp.dll. Add this reference to the references folder and recompile.

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