WPF

<ComboBox x:Name="cboType" Grid.Row="2" Grid.Column="1" ItemsSource="{Binding AttrTypeList,Mode=TwoWay}"
					DisplayMemberPath="AttrType" 
					SelectedValuePath="AttrTypeID" 
					SelectedValue="{Binding SelectedAttrCostume.AttrTypeID,Mode=TwoWay}"/>

private ObservableCollection<LookupModel> _Departments;
public ObservableCollection<LookupModel> Departments
{
    get { return _Departments; }
    set
    {
        if (_Departments != value)
        {
            _Departments = value;
            RaisePropertyChanged("Departments");
        }
    }
}

private LookupModel _SelectedDepartment;
public LookupModel SelectedDepartment
{
    get { return _SelectedDepartment; }
    set
    {
        if (_SelectedDepartment != value)
        {
            _SelectedDepartment = value;
            RaisePropertyChanged("SelectedDepartment");
        }
    }
}

public class LookupModel : _BaseModel
{
    private int _Id = 0;
    public int Id
    {
        get { return _Id; }
        set
        {
            if (_Id != value)
            {
                _Id = value;
                RaisePropertyChanged("Id");
            }
        }
    }

    private string _Caption = string.Empty;
    public string Caption 
    {
        get { return _Caption; }
        set
        {
            if (_Caption != value)
            {
                _Caption = value;
                RaisePropertyChanged("Caption");
            }
        }
    }
}

SelectedDepartment = Job.Department;