public static class DataRW { public static void WriteToFile(string content, string filename) { try { // Get the local folder. System.IO.IsolatedStorage.IsolatedStorageFile local = System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication(); // Create a new folder named DataFolder. if (!local.DirectoryExists("DataFolder")) local.CreateDirectory("DataFolder"); // Create a new file named DataFile.txt. using (var isoFileStream = new System.IO.IsolatedStorage.IsolatedStorageFileStream( "DataFolder\\" + filename, System.IO.FileMode.Create, local)) { // Write the data from the textbox. using (var isoFileWriter = new System.IO.StreamWriter(isoFileStream)) { isoFileWriter.WriteLine(content); } } } catch { } } public static string ReadFile(string filename) { try { // Obtain a virtual store for the application. System.IO.IsolatedStorage.IsolatedStorageFile local = System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication(); if (local.FileExists("DataFolder\\" + filename)) { // Specify the file path and options. using (var isoFileStream = new System.IO.IsolatedStorage.IsolatedStorageFileStream ("DataFolder\\" + filename, System.IO.FileMode.Open, local)) { // Read the data. using (var isoFileReader = new System.IO.StreamReader(isoFileStream)) { return isoFileReader.ReadLine(); } } } else { return null; } } catch { return null; } } }