使用c#和c++之间的字符串封送结构数组。字符串为空

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct MyStruct
{
    public int intValue;
    [MarshalAs(UnmanagedType.LPWStr)]
    public string stringValue;
}

struct MyStruct
{
    int intValue;
    wchar_t* stringValue;
};

[DllImport("YourCppLibrary.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void YourCppFunction(ref MyStruct myStruct);

extern "C" __declspec(dllexport) void YourCppFunction(MyStruct* myStruct)
{
    // 处理逻辑
}

MyStruct myStruct = new MyStruct();
myStruct.intValue = 123;
myStruct.stringValue = null; // 字符串为空

YourCppFunction(ref myStruct);