Объяснить код - C# (179564)

public async void ReadGuyAsync()
{
if (String.IsNullOrEmpty(Path))
return;
latestGuyFile = await StorageFile.GetFileFromPathAsync(Path);
using (IRandomAccessStream stream =
await latestGuyFile.OpenAsync(FileAccessMode.Read))
using (Stream inputStream = stream.AsStreamForRead())
{
DataContractSerializer serializer = new DataContractSerializer(typeof(Guy));
NewGuy = serializer.ReadObject(inputStream) as Guy;
}
OnPropertyChanged("NewGuy");
OnPropertyChanged("LatestGuyFile");
}
 
public async void WriteGuyAsync(Guy guyToWrite)
{
IStorageFolder guysFolder =
await KnownFolders.DocumentsLibrary.CreateFolderAsync("Guys",
CreationCollisionOption.OpenIfExists);
latestGuyFile =
await guysFolder.CreateFileAsync(guyToWrite.Name + ".xml",
CreationCollisionOption.ReplaceExisting);
using (IRandomAccessStream stream =
await latestGuyFile.OpenAsync(FileAccessMode.ReadWrite))
using (Stream outputStream = stream.AsStreamForWrite())
{
DataContractSerializer serializer = new DataContractSerializer(typeof(Guy));
serializer.WriteObject(outputStream, guyToWrite);
}
Path = latestGuyFile.Path;
OnPropertyChanged("Path");
OnPropertyChanged("LatestGuyFile");
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler propertyChangedEvent = PropertyChanged;
if (propertyChangedEvent != null)
{
propertyChangedEvent(this, new PropertyChangedEventArgs(propertyName));
}
}