C#关联自定义文件类型到应用程序并实现自动导入功能

[DllImport("shell32.dll")]
public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);

SHChangeNotify(0x8000000, 0, IntPtr.Zero, IntPtr.Zero);

using System;
using System.Collections.Generic;
using System.windows.FORMs;
using Microsoft.Win32;
namespace AppC
{
    static class Program
    {
        /// <summary> 
        /// 应用程序的主入口点。 
        /// </summary> 
        [STAThread]
        static void Main(string[] args) 
        { 
            Application.EnableVisualStyles(); 
            Application.SetCompatibleTextRenderingDefault(false); 
 
            /// 是否通过关联打开的软件 
            if (args.Length > 0) 
            {
                string path="";
                for(int i=0;i<args.Length;i++)
                    path+=args[i]+" ";
                path=path.TrimEnd(' ');
                Console.WriteLine(path);
                Console.ReadKey();
                //Application.Run(new mainForm(path)); 
            }
            else 
            { 
                string keyName; 
                string keyValue; 
                keyName = "C2File"; 
                keyValue = "C2文件"; 
                ReGIStryKey isExCommand = null; 
                bool isCreateRegistry = true; 
 
                try 
                { 
                    /// 检查 文件关联是否创建 
                    isExCommand = Registry.ClassesRoot.OpenSubKey(keyName); 
                    if (isExCommand == null) 
                    { 
                        isCreateRegistry = true; 
                    } 
                    else 
                    { 
                        if (isExCommand.GetValue("Create").ToString() == Application.ExecutablePath.ToString()) 
                        { 
                            isCreateRegistry = false; 
                        } 
                        else 
                        { 
                            Registry.ClassesRoot.DeleteSubKeyTree(keyName); 
                            isCreateRegistry = true;                             
                        } 
                    } 
                } 
                catch (Exception) 
                { 
                    isCreateRegistry = true; 
                } 
 
                /// 假如 文件关联 还没有创建，或是关联位置已被改变 
                //if (isCreateRegistry) 
                { 
                    try 
                    { 
                        RegistryKey key, keyico; 
                        key = Registry.ClassesRoot.CreateSubKey(keyName); 
                        key.SetValue("Create", Application.ExecutablePath.ToString()); 
 
                        keyico = key.CreateSubKey("DefaultIcon"); 
                        keyico.SetValue("", Application.ExecutablePath + ",0"); 
                        
                        
 
                        key.SetValue("", keyValue); 
                        key = key.CreateSubKey("Shell"); 
                        key = key.CreateSubKey("Open"); 
                        key = key.CreateSubKey("Command"); 
 
                        /// 关联的位置 
                        key.SetValue("", Application.ExecutablePath.ToString() + @" %1/");
 
                        /// 关联的文件扩展名,  
                        keyName = ".c2"; 
                        keyValue = "C2File"; 
                        key = Registry.ClassesRoot.CreateSubKey(keyName); 
                        key.SetValue("", keyValue); 
                    } 
                    catch (Exception) 
                    { 
                    } 
                } 
                //Application.Run(new mainForm("")); 
            } 
        }
    }
}

#define MyAppExeName "软件.exe"
#define AppIconName "默认图标路径"

[Registry]
Root:HKCU;Subkey: "{#MyRegInstallPath_sk}" ; ValueType:string; ValueName:"{#MyRegInstallPath_vn}"; ValueData:"{app}";Flags:uninsdeletekeyifempty
Root: HKCR; Subkey: ".c2"; Flags: uninsdeletekey
Root: HKCR; Subkey: ".c2"; ValueType: string; ValueName: ""; ValueData: "C2File"
Root: HKCR; Subkey: "C2File"; Flags: uninsdeletekey
Root: HKCR; Subkey: "C2File\DefaultIcon"; Flags: uninsdeletekey
Root: HKCR; Subkey: "C2File\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\{#AppIconName}"; Flags: 
Root: HKCR; Subkey: "C2File\shell"; Flags: uninsdeletekey
Root: HKCR; Subkey: "C2File\shell\open"; Flags: uninsdeletekey
Root: HKCR; Subkey: "C2File\shell\open\command"; Flags: uninsdeletekey
Root: HKCR; Subkey: "C2File\shell\open\command"; ValueType: string; ValueName: ""; ValueData: "{app}\{#MyAppExeName} ""%1"""; Flags: