问如何使用SharpDX绘制文本？

EN

using System;
using SharpDX;
using SharpDX.Direct3D11;
using SharpDX.Windows;
using SharpDX.Direct2D1;
using SharpDX.DirectWrite;
using SharpDX.DXGI;

namespace SharpDXRenderer
{
    static class Program
    {

        [STAThread]
        static void Main()
        {
            SharpDX.DirectWrite.TextFormat directWriteTextFormat;
            SharpDX.DirectWrite.Factory directWriteFactory;
            SharpDX.Direct2D1.SolidColorBrush directWriteFontColor;
            SharpDX.Direct2D1.RenderTarget direct2DRenderTarget;
            Surface d2dSurface;

            RenderForm form = new RenderForm("Example");

            var desc = new SwapChainDescription()
            {
                BufferCount = 1,//buffer count
                ModeDescription = new ModeDescription(form.ClientSize.Width,     form.ClientSize.Height, new Rational(60, 1), Format.R8G8B8A8_UNorm),//sview
                IsWindowed = true,
                OutputHandle = form.Handle,
                SampleDescription = new SampleDescription(1, 0),
                SwapEffect = SwapEffect.Discard,
                Usage = Usage.RenderTargetOutput
            };



            var d2dFactory = new SharpDX.Direct2D1.Factory();
            d2dSurface = backBuffer.QueryInterface<Surface>();

            direct2DRenderTarget = new SharpDX.Direct2D1.RenderTarget(d2dFactory, d2dSurface, new     SharpDX.Direct2D1.RenderTargetProperties(new     SharpDX.Direct2D1.PixelFormat(Format.Unknown,     SharpDX.Direct2D1.AlphaMode.Premultiplied)));

            directWriteFactory = new SharpDX.DirectWrite.Factory();

            directWriteTextFormat = new SharpDX.DirectWrite.TextFormat(directWriteFactory, "Calibri", 12) {     TextAlignment = SharpDX.DirectWrite.TextAlignment.Leading, ParagraphAlignment =     SharpDX.DirectWrite.ParagraphAlignment.Near };

            directWriteFontColor = new SharpDX.Direct2D1.SolidColorBrush(direct2DRenderTarget, Color.White);
        }
    }
}

d2dSurface = backBuffer.QueryInterface<Surface>();