sql.cs

TeamMatesViewModel.cs

    public readonly SQLiteConnection conn;
    ...
    public TeamMatesViewModel()
    {  
    ...
       conn = new SQLiteConnection($@"{FileSystem.AppDataDirectory}/teammates.db3");
       TeamMateSquad = new ObservableCollection<TeamMateItem>(conn.Table<TeamMateItem>().ToList());
    }

TeamMateItem.cs

    [Table("teammates")]
    public class TeamMateItem : INotifyPropertyChanged
    {
        [PrimaryKey, AutoIncrement]
        public int Id { get; set; }        
        ...
        [MaxLength(250), Unique]
        public string Name        
        ...        
        [MaxLength(10)]
        public uint Level