OpenTween.TweenMain.OpenUriInBrowserAsync C# (CSharp) Method

        public Task OpenUriInBrowserAsync(string UriString)
        {
            return Task.Run(() =>
            {
                string myPath = UriString;

                try
                {
                    var configBrowserPath = this._cfgLocal.BrowserPath;
                    if (!string.IsNullOrEmpty(configBrowserPath))
                    {
                        if (configBrowserPath.StartsWith("\"", StringComparison.Ordinal) && configBrowserPath.Length > 2 && configBrowserPath.IndexOf("\"", 2, StringComparison.Ordinal) > -1)
                        {
                            int sep = configBrowserPath.IndexOf("\"", 2, StringComparison.Ordinal);
                            string browserPath = configBrowserPath.Substring(1, sep - 1);
                            string arg = "";
                            if (sep < configBrowserPath.Length - 1)
                            {
                                arg = configBrowserPath.Substring(sep + 1);
                            }
                            myPath = arg + " " + myPath;
                            System.Diagnostics.Process.Start(browserPath, myPath);
                        }
                        else
                        {
                            System.Diagnostics.Process.Start(configBrowserPath, myPath);
                        }
                    }
                    else
                    {
                        System.Diagnostics.Process.Start(myPath);
                    }
                }
                catch (Exception)
                {
                    //MessageBox.Show("ブラウザの起動に失敗、またはタイムアウトしました。" + ex.ToString());
                }
            });
        }