Help With C# Fractions Program!

[yourexodus]

All,

I have the code below for the following problem:

Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition:
» Create properties for each field. The set accessor for the denominator should not allow a 0 value; the value defaults to 1.
» Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameter-less; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.)
» Add a Reduce()method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2.
» Add an operator+()method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce()method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20.
» Include a function that returns a string that contains a Fraction in the usual display format—the whole number, a space, the numerator, a slash (/), and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should display (for example, 2 instead of 2 0/3). Write a Main()method that instantiates several Fractions and demonstrate that all the methods work correctly. Save the program as FractionDemo.cs.

using System;
public class FractionDemo
{
    public static void Main()
    {
        Fraction fractionComplete = new Fraction(10, 1, 4);
        Fraction fractionNumDen = new Fraction(2, 10);
        Fraction fractionNumDen2 = new Fraction(3, 10);
        Fraction fractionNone = new Fraction();
        Fraction fractionCombined;

        fractionCombined = fractionNumDen + fractionNumDen2;

        Display(fractionComplete);
        Display(fractionNumDen);
        Display(fractionNone);
        Display(fractionCombined);

        Console.ReadLine();

    }


    public static void Display(Fraction incNumbers)
    {
        string fractionString;

        if (incNumbers.Whole >= 1 && incNumbers.Numerator == 0)
        {
            fractionString = ("The fraction is " + incNumbers.Whole + ".");
            Console.WriteLine(fractionString);
        }
        else if (incNumbers.Whole == 0 && incNumbers.Numerator >= 1)
        {
            fractionString = ("The fraction is " + incNumbers.Numerator + "/" + incNumbers.Denominator + ".");
            Console.WriteLine(fractionString);
        }
        else if (incNumbers.Whole >= 1)
        {
            fractionString = ("The fraction is " + incNumbers.Whole + " " + incNumbers.Numerator + "/" + incNumbers.Denominator + ".");
            Console.WriteLine(fractionString);
        }
    }
}


public class Fraction
{
    private int whole;
    private int numerator;
    private int denominator;

    public int Whole
    {
        get { return whole; }
        set { whole = value; }
    }

    public int Numerator
    {
        get { return numerator; }
        set { numerator = value; }
    }

    public int Denominator
    {
        get { return denominator; }
        set
        {
            if (value >= 1)
                denominator = value;
            else
                denominator = 1;
        }
    }

    public Fraction (int incWhole, int incNumerator, int incDenominator)
    {
        Whole = incWhole;
        Numerator = incNumerator;
        Denominator = incDenominator;
    }

    public Fraction (int incNumerator, int incDenominator)
    {
        Whole = 0;
        Reduce(incNumerator, incDenominator);
        Numerator = incNumerator;
        Denominator = incDenominator;
    }

    public Fraction()
    {
        Whole = 0;
        Numerator = 0;
        Denominator = 1;
    }

    public static Fraction operator+ (Fraction a, Fraction b)
    {
        int r1 = a.Numerator * b.Denominator + b.Numerator * a.Denominator;
        int r2 = a.Denominator * b.Denominator;
        return new Fraction(r1, r2);

    }

    public static int Reduce(int incNum, int incDen)
    {
        if (incNum == 0)
        {
            return incDen;
        }

        while (incDen != 0)
        {
            if (incNum > incDen)
            {
                incNum -= incDen;
            }
            else
            {
                incDen -= incNum;
            }
        }

        return incNum;

    }
}

I'm getting a number of errors, but I can't figure out exactly what's causing it. I think it may be the Reduce or operator+ method, but I'm not sure how to re-write it. I would greatly appreciate your prompt response. Thanks!