/// <summary>
/// Replaces the current version with a new version.
/// </summary>
/// <param name="change">Change from current version to new version</param>
public void AppendChange(TextChangeEventArgs change)
{
if (change == null)
throw new ArgumentNullException("change");
currentVersion.change = change;
currentVersion.next = new Version(currentVersion);
currentVersion = currentVersion.next;
}
