从XNA3.1到xna4.0的转换

如何将此代码部分从XNA 3.1转换为XNA 4.0
如果有人知道，请帮助。

public ModelLightMesh(Viewer3D viewer, Vector3 position, float radius, Color color, float u0, float v0, float u1, float v1)
    {
        var verticies = new[] {
            new VertexPositionColorTexture(new Vector3(position.X - radius, position.Y + radius, position.Z), color, new Vector2(u1, v0)),
            new VertexPositionColorTexture(new Vector3(position.X + radius, position.Y + radius, position.Z), color, new Vector2(u0, v0)),
            new VertexPositionColorTexture(new Vector3(position.X + radius, position.Y - radius, position.Z), color, new Vector2(u0, v1)),
            new VertexPositionColorTexture(new Vector3(position.X - radius, position.Y - radius, position.Z), color, new Vector2(u1, v1)),
        };
        VertexDeclaration = new VertexDeclaration(viewer.GraphicsDevice, VertexPositionColorTexture.VertexElements);
        VertexBuffer = new VertexBuffer(viewer.GraphicsDevice, VertexPositionColorTexture.SizeInBytes * verticies.Length, BufferUsage.WriteOnly);
        VertexBuffer.SetData(verticies);
    }