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/target:winmdobj (C# Compiler Options)

If you use the /target:winmdobj compiler option, the compiler creates an intermediate .winmdobj file that you can convert to a Windows Runtime binary (.winmd) file. The .winmd file can then be consumed by JavaScript and C++ programs, in addition to managed language programs.

/target:winmdobj

The winmdobj setting signals to the compiler that an intermediate module is required. In response, Visual Studio compiles the C# class library as a .winmdobj file. The .winmdobj file can then be fed through the WinMDExp export tool to produce a Windows metadata (.winmd) file. The .winmd file contains both the code from the original library and the WinMD metadata that is used by JavaScript or C++ and by the Windows Runtime.

The output of a file that’s compiled by using the /target:winmdobj compiler option is designed to be used only as input for the WimMDExp export tool; the .winmdobj file itself isn’t referenced directly.

Unless you use the /out option, the output file name takes the name of the first input file. A Main method isn’t required.

If you specify the /target:winmdobj option at a command prompt, all files until the next /out or /target:module option are used to create the Windows program.

To set this compiler option in the Visual Studio IDE for a Windows Store app

  1. In Solution Explorer, open the shortcut menu for your project, and then choose Properties.

  2. Choose the Application tab.

  3. In the Output type list, choose WinMD File.

    The WinMD File option is available only for Windows Store app templates.

For information about how to set this compiler option programmatically, see OutputType.

The following command compiles filename.cs into an intermediate .winmdobj file.

csc /target:winmdobj filename.cs
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