Manager_WPF.PluginInstallerHelper.InstallPlugin C# (CSharp) Method

        public void InstallPlugin(string filepath)
        {
            try
            {
                string ErrorText = string.Empty;

                InstallPlugin pi = new InstallPlugin(filepath);
                pi.ShowDialog();

                if (pi.install)
                {
                    if (!InstallPlugin(filepath, ref ErrorText))
                        MessageBox.Show("Package was not successfully installed.");
                    else if (!string.IsNullOrEmpty(ErrorText))
                        MessageBox.Show("Package installed.");
                    else
                        MessageBox.Show("Package installed.");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error installing plugin: " + ex.Message);
            }
        }

        public bool SignalExternalCommandLineArgs(IList <string> args)
        {
            MainWindow.WindowState = WindowState.Normal;
            MainWindow.Activate();

            string filename;

            if (args != null && args.Count == 2)
            {
                if (System.IO.File.Exists(System.IO.Path.GetFullPath(args[1])))
                {
                    filename = System.IO.Path.GetFileName(System.IO.Path.GetFullPath(args[1]));


                    if (filename.EndsWith("osapp", StringComparison.Ordinal))
                    {
                        // its a plugin package
                        PluginInstallerHelper pInst = new PluginInstallerHelper();
                        pInst.InstallPlugin(System.IO.Path.GetFullPath(args[1]));
                    }
                }
            }

            return(true);
        }