ComparisonAdapter
ComparisonAdapter class centralizes all comparisons of
            values in NUnit, adapting to the use of any provided
             IComparer,  IComparer<T>
            or  Comparison<T>.
            
                
Gets the default ComparisonAdapter, which wraps an
            NUnitComparer object.
            
protected ComparisonAdapter()
Returns a ComparisonAdapter that wraps an  IComparer
Returns a ComparisonAdapter that wraps an  IComparer<T>
Returns a ComparisonAdapter that wraps a  Comparison<T>
Compares two objects