private void Project_AddNew_Load(object sender, EventArgs e)
        {
            List <Personel> personels = DataBaseQueries.GetAllPersonel();

            foreach (Personel personel in personels)
            {
                dataGridView_personel.Rows.Add(personel.personelid, personel.personelname);
            }
        }
        private void FillButtons()
        {
            List <Project> projects = DataBaseQueries.GetProjects();

            foreach (Project project in projects)
            {
                project.button      = new Button();
                project.button.Name = project.projectid.ToString();
                AddButtonToForm(project.button, panel_projects, project.projectname);
            }
            List <Personel> personels = DataBaseQueries.GetAllPersonel();

            foreach (Personel personel in personels)
            {
                AddButtonToForm(new Button(), panel_personel, personel.personelname);
            }
        }