如何以编程方式获取Visual Studio使用的内置文件类型图标

using Microsoft.VisualStudio.Imaging;
using Microsoft.VisualStudio.Imaging.Interop;
using Microsoft.VisualStudio.Shell.Interop;

public class FileIconProvider : IVsImageService
{
    public ImageMoniker GetImageMoniker(string fileName)
    {
        // 获取文件扩展名
        string extension = System.IO.Path.GetExtension(fileName);

        // 获取文件类型的图标标识符
        ImageMoniker imageMoniker = KnownMonikers.Document;

        // 根据文件扩展名设置图标标识符
        if (extension == ".cs")
        {
            imageMoniker = KnownMonikers.CSFileNode;
        }
        else if (extension == ".vb")
        {
            imageMoniker = KnownMonikers.VBFileNode;
        }
        // 添加更多文件类型的判断

        return imageMoniker;
    }

    public int GetImage(ImageMoniker imageMoniker, out IVsUIObject result)
    {
        result = null;

        // 将ImageMoniker对象转换为System.Drawing.Image对象
        System.Drawing.Image image = imageMoniker.GetImage();

        // 创建IVsUIObject对象
        result = new Microsoft.VisualStudio.Shell.Interop.VsUIObject(image);

        return Microsoft.VisualStudio.VSConstants.S_OK;
    }

    // 其他IVsImageService接口方法的实现
}