C＃vs2015中的C ++ DLL XML文档注释

Question

i have a DLL written in C++ with some calculation functions.
i use PInvoke (Platform Invoke) for using it in C# windows form.
i also have a XML documentation in the DLL folder.
i'm using Win7 x64 and updated VS2015 and x64 compiler in both sides.
Question: why i can't see comments in intelliSense in C#? here is my C++ code

///<summary>this is sample</summary>  
extern "C" __declspec(dllexport) int __stdcall foo(int a, int b)
{
    int c = a*a + b*b;
    return c;
}

here is my C# code

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("Project2")]
        public static extern int foo(int a, int b);

        private void Form1_Load(object sender, EventArgs e)
        {
            label1.Text = foo(4, 5).ToString();
        }
    }
}

the function works fine but i can't see documentation in intelliSense.
thanks.

Answer 1

You can create the XML documentation on the method in your C# code:

    /// <summary>
    /// Does some stuff.
    /// </summary>
    /// <param name="a">Helps with stuff.</param>
    /// <param name="b">Also helps with stuff.</param>
    /// <returns>The result of doing stuff.</returns>
    [DllImport("Project2")]
    public static extern int foo(int a, int b);

Note that attribute sections are considered part of the method declaration, and as such, the XML documentation must precede these ( source ).

Answer 2

Sorry for late Answer! I write my solution for others if they have same problem. i found that for C++ PInvoke it is impossible. XML documentation is for .Net compliant codes. I change my solution for that project to C++/CLI. and that was the solution! C++/CLI is .Net compliant and fully support XML documentation. also its referencing is different. you simply add the C++/CLI project to your solution or add its dll to references. C++/CLI in my opinion have some benefits and i think it doesn't have drawbacks in comparison with C++. i don't think it have been possible with PInvoke. Best Regards!