What's the purpose of GC.SuppressFinalize(this) in Dispose() method?

Question

I have the following code:

public void Dispose()
{
    if (_instance != null)
    {
        _instance = null;
        // Call GC.SupressFinalize to take this         


        

Answer 1

If your type implements a finalizer (~MyType() { }), it keeps the garbage collector from running it. Used when your finalizer takes care of unmanaged types, but the user has already called Dispose() (either explicitly or via a using() { } block), freeing those unmanaged types.