Question

I have one class with 2 properties called MinValue, MaxValue , If somebody wants to invoke this class and Instantiate this class ,I need some to have constructor that allow select MinValue Or Max Value Or Both Of them , the MinValue and MaxValue both of them are int,
So the constructor doesn’t allow me like this:

public class Constructor
{
    public int Min { get; set; }
    public int Max { get; set; }
    public Constructor(int MinValue, int MaxValue)
    {
        this.Min = MinValue;
        this.Max = MaxValue;
    }

    public Constructor(int MaxValue)
    {
        this.Max = MaxValue;
    }

    public Constructor(int MinValue)
    {
        this.Min = MinValue;
    }
}

Now I cannot do that because I cannot overload two constructor,
How Can I implement this?

Answer 1

I would create two static methods for the two parts where you’ve got only partial information. For example:

public Constructor(int minValue, int maxValue)
{  
    this.Min = minValue;
    this.Max = maxValue;
}

public static Constructor FromMinimumValue(int minValue)
{
    // Adjust default max value as you wish
    return new Constructor(minValue, int.MaxValue);
}

public static Constructor FromMaximumValue(int maxValue)
{
    // Adjust default min value as you wish
    return new Constructor(int.MinValue, maxValue);
}

(The C# 4 option of using named arguments is good too, but only if you know that all your callers will support named arguments.)