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C# application data folder（取得本機非漫遊使用者的應用程式資料路徑。）     資料來源：https://msdn.microsoft.com/zh-tw/library/system.windows.forms.application.localuserappdatapath(v=vs.110).aspx   private MyApplicationContext() {     formCount = 0;       // Handle the ApplicationExit event to know when the application is exiting.     Application.ApplicationExit += new EventHandler(this.OnApplicationExit);       try {         // Create a file that the application will store user specific data in.         userData = new FileStream(Application.UserAppDataPath + "\\appdata.txt", FileMode.OpenOrCreate);       } catch(IOException e) {         // Inform the user that an error occurred.         MessageBox.Show("An error occurred while attempting to show the application." +                         "The error is:" + e.ToString());           // Exit the current thread instead of showing the windows.         ExitThread();     }       // Create both application forms and handle the Closed event     // to know when both forms are closed.     form1 = new AppForm1();     form1.Closed += new EventHandler(OnFormClosed);                form1.Closing += new CancelEventHandler(OnFormClosing);                 formCount++;       form2 = new AppForm2();     form2.Closed += new EventHandler(OnFormClosed);                form2.Closing += new CancelEventHandler(OnFormClosing);                formCount++;       // Get the form positions based upon the user specific data.     if (ReadFormDataFromFile()) {         // If the data was read from the file, set the form         // positions manually.         form1.StartPosition = FormStartPosition.Manual;         form2.StartPosition = FormStartPosition.Manual;           form1.Bounds = form1Position;         form2.Bounds = form2Position;     }       // Show both forms.     form1.Show();     form2.Show(); }   privatevoid OnApplicationExit(object sender, EventArgs e) {     // When the application is exiting, write the application data to the     // user file and close it.     WriteFormDataToFile();       try {         // Ignore any errors that might occur while closing the file handle.         userData.Close();     } catch {} }