在C#中创建IntVector2类时，我应该记住什么

我目前正试图编写一些类来帮助我编写各种主要是2D的应用程序和/或游戏。我真正需要的东西之一（因为C#XNA"Point"类很糟糕）是IntVector2类，它与标准的XNA"Vector2"类非常相似。

目前，我有这样的编码（休息后更多的东西）：

using System;
using Microsoft.Xna.Framework;
namespace LPG.Utilities
{
    public class IntVector2
    {
        //Properties
        public readonly int X = 0;
        public readonly int Y = 0;
        private float magnitude = 0;
        //Special properties
        public float Magnitude
        {
            get
            {
                if (this.magnitude == 0)
                {
                    return (float)Math.Sqrt((Math.Abs(this.X ^ 2) + Math.Abs(this.Y ^ 2)));
                }
                else
                {
                    return this.magnitude;
                }
            }
        }
        //Methods
        public Vector2 Normalize()
        {
            return new Vector2(this.X / (float)this.Magnitude, this.Y / (float)this.Magnitude);
        }
        //Constructors
        public IntVector2()
        {
        }
        public IntVector2(int Both)
        {
            this.X = Both;
            this.Y = Both;
        }
        public IntVector2(int X, int Y)
        {
            this.X = X;
            this.Y = Y;
        }
        //Casts
        public static implicit operator Vector2(IntVector2 From)
        {
            return new Vector2(From.X, From.Y);
        }
        public static implicit operator IntVector2(Vector2 From)
        {
            return new IntVector2((int)From.X, (int)From.Y);
        }
        public static implicit operator string(IntVector2 From)
        {
            return "(" + From.X + ", " + From.Y + ")";
        }
        //IntVector2-IntVector2 operators
        public static IntVector2 operator +(IntVector2 First, IntVector2 Second)
        {
            return new IntVector2(First.X + Second.X, First.Y + Second.Y);
        }
        public static IntVector2 operator -(IntVector2 First, IntVector2 Second)
        {
            return new IntVector2(First.X - Second.X, First.Y - Second.Y);
        }
        public static IntVector2 operator *(IntVector2 First, IntVector2 Second)
        {
            return new IntVector2(First.X * Second.X, First.Y * Second.Y);
        }
        public static IntVector2 operator /(IntVector2 First, IntVector2 Second)
        {
            return new IntVector2(First.X / Second.X, First.Y / Second.Y);
        }
        //IntVector2-int operators:
        public static IntVector2 operator +(IntVector2 First, int Second)
        {
            return new IntVector2(First.X + Second, First.Y + Second);
        }
        public static IntVector2 operator -(IntVector2 First, int Second)
        {
            return new IntVector2(First.X - Second, First.Y - Second);
        }
        public static IntVector2 operator *(IntVector2 First, int Second)
        {
            return new IntVector2(First.X * Second, First.Y * Second);
        }
        public static IntVector2 operator /(IntVector2 First, int Second)
        {
            return new IntVector2(First.X / Second, First.Y / Second);
        }
    }
}

我应该做些什么来提高这门课？我曾考虑过使用结构而不是类，但我没有足够的经验来做出真正的决定。

提前谢谢。