A simple Quad object for XNA

XNASimpleQuad

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework;

namespace XNAGists
{
    public class SimpleQuad
    {
        private GraphicsDevice device;

        private VertexPositionColor[] vertices;
        private short[] indices;
        private VertexBuffer vertexBuffer;
        private IndexBuffer indexBuffer;

        private Vector3 position = Vector3.Zero;

        public SimpleQuad(GraphicsDevice device)
        {
            this.device = device;

            InitVertices();
            InitIndices();
        }

        private void InitIndices()
        {
            indices = new short[4];

            // First triangle
            indices[0] = 0;
            indices[1] = 1;
            indices[2] = 2;
            // Second triangle
            indices[3] = 3;

            indexBuffer = new IndexBuffer(device, IndexElementSize.SixteenBits, 4, BufferUsage.None);
            indexBuffer.SetData<short>(indices);
        }

        private void InitVertices()
        {
            vertices = new VertexPositionColor[4];

            vertices[0] = new VertexPositionColor();
            vertices[0].Position = new Vector3(-1, 1, 0);
            vertices[0].Color = Color.Red;
            vertices[1] = new VertexPositionColor();
            vertices[1].Position = new Vector3(1, 1, 0);
            vertices[1].Color = Color.Green;
            vertices[2] = new VertexPositionColor();
            vertices[2].Position = new Vector3(-1, -1, 0);
            vertices[2].Color = Color.Blue;
            vertices[3] = new VertexPositionColor();
            vertices[3].Position = new Vector3(1, -1, 0);
            vertices[3].Color = Color.Purple;

            // Create our VertexBuffer
            vertexBuffer = new VertexBuffer(device, typeof(VertexPositionColor), 4, BufferUsage.None);
            vertexBuffer.SetData<VertexPositionColor>(vertices);
        }

        public void Update(Microsoft.Xna.Framework.GameTime gameTime)
        {
            //throw new NotImplementedException();
        }

        public void Draw(Microsoft.Xna.Framework.GameTime gameTime, BasicEffect effect)
        {
            effect.VertexColorEnabled = true;

            device.SetVertexBuffer(vertexBuffer);
            device.Indices = indexBuffer;
            effect.CurrentTechnique.Passes[0].Apply();
            device.DrawIndexedPrimitives(PrimitiveType.TriangleStrip, 0, 0, vertices.Length, 0, 2);
        }
    }
}