public override University LoadData()
{
xDocument.Load(FileName);
XmlNode xRoot = xDocument.DocumentElement;
if (xRoot.Name != "groups")
{
throw new XmlException("Illegal file structure.");
}
University groups = new University();
foreach (XmlNode xGroup in xRoot)
{
groups.AddGroup(LoadGroup(xGroup));
}
return(groups);
}
public RemoveGroupCommand(University receiver,
Group group) : base(receiver)
{
this.oldGroup = group ??
throw new ArgumentNullException("group");
}
public abstract void SaveData(University university);