private void lsbxTasks_SelectedIndexChanged(object sender, EventArgs e) { Task taskToModify = (Task)lsbxActiveTasks.SelectedItem; techTaskToModify = AllTechnicianTasks.Find(tt => tt.Task.TaskID == taskToModify?.TaskID); if (!(techTaskToModify is null)) { txtCurrentTech.Text = techTaskToModify.Technician.Person.FullName; } PopulateTask(); //quality of life btnReAssignTech.Enabled = true; }