Why is it important to manage memory release manually in some cases?

In C#, the garbage collector (GC) automatically frees unused memory. However, in some cases, manual memory management is important:

• When an object uses unmanaged resources (files, network connections, handles) that are not controlled by the GC.
• To release resources promptly to avoid leaks and locks.

This is done by implementing the IDisposable interface and the Dispose() method, where resources are explicitly released.

Example:

class FileHandler : IDisposable
{
    private FileStream _fileStream;

    public FileHandler(string path) {
        _fileStream = new FileStream(path, FileMode.Open);
    }

    public void Dispose() {
        _fileStream?.Dispose();
    }
}

Thus, manual memory management is important for resource control and preventing performance and stability issues.