如何将文件扩展名与C#中的当前可执行文件关联

using Microsoft.Win32;

public static void RegisterFileAssociation()
{
    string appName = "MyApp";
    string extension = ".myext";
    string progId = "MyApp.FileAssoc";
    string applicationPath = System.Reflection.Assembly.GetExecutingAssembly().Location;

    // 创建ProgID
    Registry.ClassesRoot.CreateSubKey(progId).SetValue("", "MyApp File Association");
    Registry.ClassesRoot.CreateSubKey(progId + "\\DefaultIcon").SetValue("", "\"" + applicationPath + "\",0");
    Registry.ClassesRoot.CreateSubKey(progId + "\\shell\\open\\command").SetValue("", "\"" + applicationPath + "\" \"%1\"");

    // 将扩展名与ProgID关联
    Registry.ClassesRoot.CreateSubKey(extension).SetValue("", progId);
}