C#

public abstract class Base
{
    public Base()
    {
        location = new Point();
    }

    public abstract void Paint(Graphics g);

    public string ShapeName { get; protected set; }

    private Point location;
    public Point Location
    {
        get
        {
            return location;
        }
        set
        {
            location = value;
        }
    }

    private Size size;
    public Size Size
    {
        get
        {
            return size;
        }
        set
        {
            size = value;
        }
    }


    public int X
    {
        get
        {
            return location.X;
        }
        set
        {
            location.X = value;
        }
    }
}

public class Square : Base
{
    public Square(Point location, Size size)
        : base()
    {
        ShapeName = "Square";
        Location = location;
        Size = size;
    }

    public override void Paint(Graphics g)
    {
        // Implement the way to draw a square
    }
}

List<Base> shapes = new List<Base>();
shapes.Add(new Square(new Point(), new Size(30, 30)));
shapes[0].X = 10;

randor wrote:

I am trying to make a program similar to powerpoint

Member 10498544 wrote:

catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}

public override bool Validate(Control control, object value)
{
    string err = null;
    if (value == null && !_IsAllowNull)
        err = "Please provided valid number without a decimal point.";
    else if (value.ToString().Contains("."))
		err = "Decimal value is not allowed";
	else if (!value.IsNumber())
		err = "Please provided valid number without a decimal point.";
	else if (value.ToInt() < _minValue || value.ToInt() > _maxValue)
		err = "Value should not be greater than " + _maxValue + " or less than " + _minValue;

	if ( err != null)
		ErrorText = err;
    return err == null;
}