/// <summary>
/// Compares one snapshot to another and returns the differences
/// </summary>
/// <param name="newSnapshot">The snapshot to compare.</param>
/// <returns>a <see cref="RegistrySnapshot"/> that contains both the added and removed items.</returns>
public RegistrySnapshot CompareTo(RegistrySnapshot newSnapshot)
{
RegistrySnapshot snapshot = new RegistrySnapshot(this.Hive);
// compare "this" to what is provided, and if what is provided
// does not have an entry, the consider it deleted.
foreach (string key in this.Keys)
{
if (!newSnapshot.ContainsKey(key))
{
snapshot.Add(key, this[key]);
snapshot[key].State = RegistrySnapshotState.Removed;
}
}
// Now compare what was provided to "this" and if entries
// are missing, then consider then as newly added.
foreach (string key in newSnapshot.Keys)
{
if (!this.ContainsKey(key))
{
snapshot.Add(key, newSnapshot[key]);
snapshot[key].State = RegistrySnapshotState.Added;
}
}
return(snapshot);
}