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How to correctly implement IDisposable in a C# class that uses unmanaged resources?

πŸ‘€ Views: 266 πŸ’¬ Answers: 1 πŸ“… Created: 2025-05-31
c# idisposable memory-management csharp

I'm a bit lost with I'm getting frustrated with I'm building a feature where I'm wondering if anyone has experience with I'm working on a personal project and Hey everyone, I'm running into an issue that's driving me crazy... I'm stuck on something that should probably be simple... I'm trying to implement the `IDisposable` interface in my C# class that manages both managed and unmanaged resources. The class uses a handle to a native resource that needs to be released explicitly. However, I'm running into an issue where I'm still seeing memory leaks even after disposing of the class. Here’s what I have so far: ```csharp public class ResourceHandler : IDisposable { private IntPtr nativeResource; // Unmanaged resource private bool disposed = false; // To detect redundant calls public ResourceHandler() { nativeResource = Marshal.AllocHGlobal(100); // Allocating 100 bytes } ~ResourceHandler() { Dispose(false); } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!disposed) { if (disposing) { // Dispose managed resources, if any } // Free unmanaged resources if (nativeResource != IntPtr.Zero) { Marshal.FreeHGlobal(nativeResource); nativeResource = IntPtr.Zero; } disposed = true; } } } ``` I am using .NET 5.0, and I have a test that creates and disposes of `ResourceHandler` instances in a loop, but after several iterations, I notice that the memory usage of the application keeps increasing, indicating that the unmanaged memory is not being freed as expected. I’ve verified that `Dispose` is being called, but I’m still seeing the same behavior. Is there something I’m missing in my implementation of `IDisposable`? Should I be concerned about the finalizer? What best practices should I follow to ensure that the unmanaged resources are released properly? Thanks for your help! I'm working on a web app that needs to handle this. My development environment is Windows. I'd really appreciate any guidance on this. My development environment is Windows. Any help would be greatly appreciated! Cheers for any assistance! This is part of a larger web app I'm building. What am I doing wrong? Am I missing something obvious? Is there a simpler solution I'm overlooking?