C#调用C函数返回具有固定大小char数组的struct

#include <stdlib.h>
#include<string.h>

typedef struct {
    char data[10];
} DataStruct;

__declspec(dllexport) DataStruct* GetData() {
    DataStruct* result = (DataStruct*)malloc(sizeof(DataStruct));
    strcpy(result->data, "Hello, C#!");
    return result;
}

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct DataStruct
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]
    public string data;
}

public class Program
{
    [DllImport("YourLibraryName.dll", CallingConvention = CallingConvention.Cdecl)]
    public static extern IntPtr GetData();

    public static void Main(string[] args)
    {
        IntPtr ptr = GetData();
        DataStruct data = (DataStruct)Marshal.PtrToStructure(ptr, typeof(DataStruct));
        Console.WriteLine(data.data);
    }
}