public CompareField SortBy = CompareField.Name;

Was wondering why do I need this line of code if someone can explain...

       public CompareField SortBy = CompareField.Name;

class CarComparer
    {
        public enum CompareField {
        Name,
        MaxMph,
        Horsepower,
        Price,
        
        }
        public CompareField SortBy = CompareField.Name;

        public int Compare(Cars x, Cars y) {

            switch (SortBy)
            {
                case CompareField.Name:
                    return x.Name.CompareTo(y.Name);
                case CompareField.MaxMph:
                    return x.MaxMph.CompareTo(y.MaxMph);
                case CompareField.Horsepower:
                    return x.Horsepower.CompareTo(y.Horsepower);
                case CompareField.Price:
                    return x.Price.CompareTo(y.Price);
            
            
            }

            return x.Name.CompareTo(y.Name);
        }
    }

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yguyon28Asked:
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Fernando SotoRetiredCommented:
The line of code,

public CompareField SortBy = CompareField.Name;

is selecting the field to be used in the class CarComparer for comparison with two objects of type Cars. The problem is that the SortBy field is hard coded to compare on the property Name of the Cars object and therefore most of the code will never be executed and only allowing the comparison on the Name property and no more.
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