Algorithme pour des heures occupées en jour par des tâches

[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.Schedule")]
public partial class Schedule : INotifyPropertyChanging, INotifyPropertyChanged
{
    private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
    private int _ScheduleID;
    private System.Nullable<System.DateTime> _DateFrom;
    private System.Nullable<decimal> _Hours;
    private System.Nullable<int> _EmployeID;
    private System.Nullable<int> _RecurringID;
    private System.Nullable<int> _Priority;
    private System.Nullable<System.DateTime> _DateTo;
    private bool _IsLocked;
    private System.Nullable<int> _BumpPriority;
    private EntitySet<Case> _Cases;
    private EntitySet<Project> _Projects;
    private EntitySet<Task> _Tasks;
    private EntitySet<Task> _Tasks1;
    private EntityRef<Employee> _Employee;
    private EntityRef<Recurring> _Recurring;

    #region Extensibility Method Definitions
    partial void OnLoaded();
    partial void OnValidate(System.Data.Linq.ChangeAction action);
    partial void OnCreated();
    partial void OnScheduleIDChanging(int value);
    partial void OnScheduleIDChanged();
    partial void OnDateFromChanging(System.Nullable<System.DateTime> value);
    partial void OnDateFromChanged();
    partial void OnHoursChanging(System.Nullable<decimal> value);
    partial void OnHoursChanged();
    partial void OnEmployeIDChanging(System.Nullable<int> value);
    partial void OnEmployeIDChanged();
    partial void OnRecurringIDChanging(System.Nullable<int> value);
    partial void OnRecurringIDChanged();
    partial void OnPriorityChanging(System.Nullable<int> value);
    partial void OnPriorityChanged();
    partial void OnDateToChanging(System.Nullable<System.DateTime> value);
    partial void OnDateToChanged();
    partial void OnIsLockedChanging(bool value);
    partial void OnIsLockedChanged();
    partial void OnBumpPriorityChanging(System.Nullable<int> value);
    partial void OnBumpPriorityChanged();
    #endregion

    public Schedule()
    {
        this._Cases = new EntitySet<Case>(new Action<Case>(this.attach_Cases), new Action<Case>(this.detach_Cases));
        this._Projects = new EntitySet<Project>(new Action<Project>(this.attach_Projects), new Action<Project>(this.detach_Projects));
        this._Tasks = new EntitySet<Task>(new Action<Task>(this.attach_Tasks), new Action<Task>(this.detach_Tasks));
        this._Tasks1 = new EntitySet<Task>(new Action<Task>(this.attach_Tasks1), new Action<Task>(this.detach_Tasks1));
        this._Employee = default(EntityRef<Employee>);
        this._Recurring = default(EntityRef<Recurring>);
        OnCreated();
    }
}