When Should You Implement IDisposable in C#?

Disposing the Correct Way: Implementing IDisposable

Implementing IDisposable enables the deterministic release of unmanaged resources and disposables. In your code snippet, the User class does not handle unmanaged resources or disposable references, so disposal is not necessary. This can be resolved by marking the class as sealed, effectively preventing derived classes from overriding IDisposable.

For a more detailed example, let's consider a class called ResourceManager that manages both unmanaged resources (e.g., file handles) and IDisposable references (e.g., database connections).

Using IDisposable with Unmanaged Resources:

public class ResourceManager : IDisposable
{
    private FileStream fileStream;

    public ResourceManager()
    {
        // Allocate and open the file handle
        fileStream = new FileStream("myfile.txt", FileMode.Open);
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    protected virtual void Dispose(bool disposing)
    {
        if (disposing)
        {
            // Free managed resources
            fileStream?.Close();
            fileStream?.Dispose();
        }
        // Free native resources
        fileStream.Dispose();
    }
}

Using IDisposable with Disposable References:

public class ResourceManager : IDisposable
{
    private DisposableReference reference;

    public ResourceManager()
    {
        // Obtain the disposable reference
        reference = new DisposableReference();
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    protected virtual void Dispose(bool disposing)
    {
        if (disposing)
        {
            // Free managed resources
            reference?.Dispose();
        }
    }
}

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