C# 中的内存泄漏

csharp
public class LeakingObject
{
    public event EventHandler OnSomethingHappened;
    public void DoSomething()
    {
        // Do something
        // 触发事件
        OnSomethingHappened?.Invoke(this, EventArgs.Empty);
    }
}
public class MainClass
{
    private LeakingObject _leakingObject;
    public void Start()
    {
        _leakingObject = new LeakingObject();
        _leakingObject.OnSomethingHappened += HandleSomethingHappened;
        _leakingObject.DoSomething();
    }
    private void HandleSomethingHappened(object sender, EventArgs e)
    {
        // 处理事件
        // 忘记取消订阅事件
        // _leakingObject.OnSomethingHappened -= HandleSomethingHappened;
    }
}
public class Program
{
    public static void Main(string[] args)
    {
        var mainClass = new MainClass();
        mainClass.Start();
        // Do something else
        // 忘记将 _leakingObject 置为 null
        // mainClass._leakingObject = null;
    }
}