public async Task <MissionSimpleDto> Create()
{
MissionCreateDto Mission = new MissionCreateDto {
Name = Name, Deadline = Deadline, Description = Description, TotalSum = TotalSum
};
MissionCreating = true;
MissionRepository repository = new MissionRepository();
MissionSimpleDto mission = await repository.CreateForList(Mission);
(Application.Current.MainPage.BindingContext as MissionListViewModel).Missions.Add(mission);
MissionCreating = false;
await CloseModal();
return(mission);
}