public void Add_Practise(Practise p) { if (!this.Practises.Contains(p)) { this.Practises.Add(p); } }
public void Remove_Practise(Practise p) { if (this.Practises.Contains(p)) { this.Practises.Remove(p); } }
public void Add_Practise(Practise p) { if (!this.Practises.Contains(p)) { this.Practises.Add(p); } }
public void Remove_Practise(Practise p) { if (this.Practises.Contains(p)) { this.Practises.Remove(p); } }