现在Windwos Phone 7的数据存储得写入到独立存储空间中，有两种存储方式：1.独立文件存储；2.独立设置存储。

（1）独立文件存储

独立文件存储的使用方法与文件类似

写入：

//Obtain the virtual store for application
IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();
//Create a new folder and call it "ImageFolder"
myStore.CreateDirectory("ImageFolder");
//Create a new file and assign a StreamWriter to the store and this new file (myFile.txt)
//Also take the text contents from the txtWrite control and write it to myFile.txt
StreamWriter writeFile = new StreamWriter(new IsolatedStorageFileStream("ImageFolder\\myFile.txt", FileMode.OpenOrCreate, myStore));
writeFile.WriteLine(txtWrite.Text);
writeFile.Close();

读取：

     //Obtain a virtual store for application
    IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();
    //This code will open and read the contents of myFile.txt
    //Add exception in case the user attempts to click “Read button first.
    StreamReader readFile = null;
    try
    {
        readFile = new StreamReader(new IsolatedStorageFileStream("ImageFolder\\myFile.txt", FileMode.Open, myStore));
        string fileText = readFile.ReadLine();
        //The control txtRead will display the text entered in the file
        txtRead.Text = fileText;
        readFile.Close();
    }
    catch
    {
        txtRead.Text = "Need to create directory and the file first.";
    }

（2）独立设置存储

//获取独立设置存储对象
IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;

//写数据
setting["name"]="Bill";
setting["age"]=""20;
setting.save();
//读数据
string Name=setting["name"];

更具体的例子可以看微软SettingsSample的例子，里面有很详细的说明怎么进行独立设置存储。