单实例不能在c#中工作，程序不能访问自身

我试图让一个程序在当前实例中打开一个文件，而不是一个新的实例，这是我到目前为止所拥有的，这是我从这个问题中得到的。

static class Program
    {
        static EsfEditorSingleton controller;
        [STAThread]
        public static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            // Show the main form of the app.
            controller = new EsfEditorSingleton();
            string[] args = Environment.GetCommandLineArgs();
            controller.Run(args);
            controller.StartupNextInstance += controller.NextInstanceStartup;
        }
    }
    public class EsfEditorSingleton : WindowsFormsApplicationBase
    {
        internal EsfEditorSingleton() : base()
        {
            this.IsSingleInstance = true;
            this.MainForm = new EsfEditorForm();
        }
        public void NextInstanceStartup(object sender, StartupNextInstanceEventArgs e)
        {
            EsfEditorForm form = (EsfEditorForm)this.MainForm;
            string[] args = null;
            e.CommandLine.CopyTo(args, 0);
            form.mProcessArgs(args);
        }
    }

Update:这是上面调用的部分

public class EsfEditorForm : Form
{
    public EsfEditorForm()
    {
        this.InitializeComponent();
    }
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        string[] args = Environment.GetCommandLineArgs();
        mProcessArgs(args);
    }
    public void mProcessArgs(string[] args)
    {
        if (args.Length > 0)
        {
            for (int i = 0; i < args.Length; i++)
            {
                if (System.IO.File.Exists(args[i])) { this.OpenFile(args[i]); }
            }
        }
    }
}

当我在VS 2010 Pro(供参考)中点击F5时，它编译并启动，然后给我这个IOException在Visual Studio中没有处理错误:

进程无法访问文件"I:'Program Files'Totar'EFS Editor'VS - Solution'bin'x86'Release'EsfEditor 1.4.8.exe"，因为该文件正在被其他进程使用。

我相信上面提到的文件是当前正在运行的可执行文件。

异常堆栈

:

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at System.IO.File.Open(String path, FileMode mode, FileAccess access, FileShare share)
at EsfEditor.Parser.EsfParser..ctor(String filename)
at EsfEditor.Core.EsfObjects.EsfFile..ctor(String filePath)
at EsfEditor.Forms.EsfEditorForm.OpenFile(String filePath)
at EsfEditor.Forms.EsfEditorForm.mProcessArgs(String[] args)
at EsfEditor.Forms.EsfEditorForm.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
at System.Windows.Forms.Control.set_Visible(Boolean value)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at EsfEditor.Program.Main()

public void mProcessArgs(string[] args)
    {
        if (args.Length > 0)
        {
            for (int i = **1**; i < args.Length; i++)
            {
                if (System.IO.File.Exists(args[i])) { this.OpenFile(args[i]); }
            }
        }
    }