C# Simplify Dispose Object

public void RetireHenchman()
{
    var disposableMinion = Minion as IDisposable;
    if (disposableMinion != null)
        disposableMinion.Dispose();
    Minion = null;
}
 
The null coalescing operator can make this code more concise as well:
 
public void RetireHenchman()
{
    (Minion as IDisposable)?.Dispose();
    Minion = null;
}