通过P/Invoke将可写字符串数组从C#传递给C++

using System;
using System.Runtime.InteropServices;

public struct StringArray
{
    public int Length;
    public IntPtr Data;
}

public class Program
{
    [DllImport("YourCppLibrary.dll")]
    public static extern void ProcessStringArray(ref StringArray array);

    public static void Main()
    {
        string[] strings = { "Hello", "World" };

        StringArray array = new StringArray();
        array.Length = strings.Length;

        // 将C#中的字符串数组转换为C++中的可写字符串数组
        array.Data = Marshal.AllocHGlobal(strings.Length * IntPtr.Size);
        for (int i = 0; i < strings.Length; i++)
        {
            IntPtr ptr = Marshal.StringToHGlobalAnsi(strings[i]);
            Marshal.WriteIntPtr(array.Data, i * IntPtr.Size, ptr);
        }

        // 调用C++函数处理字符串数组
        ProcessStringArray(ref array);

        // 释放内存
        for (int i = 0; i < strings.Length; i++)
        {
            IntPtr ptr = Marshal.ReadIntPtr(array.Data, i * IntPtr.Size);
            Marshal.FreeHGlobal(ptr);
        }
        Marshal.FreeHGlobal(array.Data);
    }
}