public async Task SaveAsync(string filename, string content)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
if (content == null)
{
throw new ArgumentNullException("content");
}
await WinIsolatedStorage.AppendTextAsync(filename, content);
}
public async Task DeleteAsync(string filename)
{
await WinIsolatedStorage.DeleteAsync(filename);
await WinIsolatedStorage.AppendTextAsync(filename, string.Empty);
}