using System;
using System.Runtime.InteropServices;

public class GCHandleExample
{
    public static void Main()
    {
        // 创建一个对象
        byte[] buffer = new byte[1024];
        
        // 获取固定 GCHandle
        GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
        
        try
        {
            // 获取对象的固定地址
            IntPtr address = handle.AddrOfPinnedObject();
            Console.WriteLine($"Pinned object address: 0x{address.ToInt64():X}");
            
            // 可以通过地址进行非托管操作
        }
        finally
        {
            // 必须释放 GCHandle
            if (handle.IsAllocated)
            {
                handle.Free();
            }
        }
    }
}

public sealed class PinnedGCHandle : IDisposable
{
    private GCHandle _handle;
    
    public PinnedGCHandle(object value)
    {
        _handle = GCHandle.Alloc(value, GCHandleType.Pinned);
    }
    
    public IntPtr AddrOfPinnedObject() => _handle.AddrOfPinnedObject();
    
    public void Dispose()
    {
        if (_handle.IsAllocated)
        {
            _handle.Free();
        }
    }
}

// 使用示例
using (var handle = new PinnedGCHandle(buffer))
{
    IntPtr ptr = handle.AddrOfPinnedObject();
    // 使用 ptr...
}

string str = "example";
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(str);
GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);