如何在MonoGame上使用DrawUserPrimitive启用抗锯齿

protected override void Draw(GameTime gameTime)
{
    GraphicsDevice.Clear(Color.CornflowerBlue);

    // 获取当前渲染目标的多重采样级别
    int multiSampleCount = GraphicsDevice.PresentationParameters.MultiSampleCount;

    // 创建一个新的RasterizerState对象，并启用抗锯齿
    RasterizerState rasterizerState = new RasterizerState();
    rasterizerState.CullMode = CullMode.None;
    rasterizerState.MultiSampleAntiAlias = true;

    // 设置新的渲染状态
    GraphicsDevice.RasterizerState = rasterizerState;

    // 使用DrawUserPrimitive方法绘制图形
    // 这里是一个绘制三角形的示例
    VertexPositionColor[] vertices = new VertexPositionColor[3];
    vertices[0] = new VertexPositionColor(new Vector3(0, 0, 0), Color.Red);
    vertices[1] = new VertexPositionColor(new Vector3(100, 0, 0), Color.Green);
    vertices[2] = new VertexPositionColor(new Vector3(50, 100, 0), Color.Blue);

    GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleList, vertices, 0, 1);

    base.Draw(gameTime);
}