Unsubscribed event handlers are one of the biggest real-world leak causes.
publisher.SomeEvent += OnEvent; // stays forever if not removed
⚠ Why It Leaks
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The publisher holds a reference to your object
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GC can’t collect your object
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Memory keeps climbing
✔ The Fix
Always unsubscribe:
publisher.SomeEvent -= OnEvent;
Or use weak events or IDisposable patterns.
💡 Bonus
Use tools like:
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dotMemory
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PerfView
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Visual Studio’s Memory Analyzer