What is the DLL loading behavior when using DllImport[] in C#?

Asked Dec 04 '14 at 18:58

Active Dec 04 '14 at 18:58

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Using the following code as example:

    [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")]
    public static extern void open_console();

    [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")]
    public static extern int get_available_interface(int index, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder buffer, int maxSize);

    [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")]
    public static extern int get_buffer();

    [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")]
    public static extern int get_channels();

What would be the loading behaviour of the DLL? To be more specific, will each DllImport create one instance of the DLL and export a single function? Or will one instance of the DLL be created and all functions exported?

asked Dec 04 '14 at 18:58

Rodrigo Rutsatz

Just one, as you might expect. – Hans Passant Dec 04 '14 at 19:03
Thats what I thought, but am having some strange behaviour of the dll. Thanks – Rodrigo Rutsatz Dec 04 '14 at 19:11

What is the DLL loading behavior when using DllImport[] in C#?

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