<TextBox Name="PathTextBox" Text="{Binding PathControlValue, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged }" Grid.Column="0" />

public string PathControlValue
        {
            get { return (string) GetValue(PathValueProperty); }
            set { SetValue(PathValueProperty, value); }
        }

public static DependencyProperty PathValueProperty = DependencyProperty.Register(
            "PathControlValue",
            typeof(string),
            typeof(FolderChoosed),
            new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));

<customUserControl:FolderChoosed Grid.Column="0" LabelControlValue="Banco anexo" Margin="10"
                                                         x:Name="BancoAnexo" Grid.Row="0"
                                                         ToolTipControlTitleValue="Banco anexo"
                                                         ToolTipControlDescriptionValue="Proporciona la ruta de los anexos"
                                                         PathControlValue="{Binding CompanyMapperDto.BancoAnexoPath, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}"/>

InitializeComponent();
            _parameterService = IsnContainer.Resolve<IParameterService>();
            _dataBaseProviderService = IsnContainer.Resolve<IDataBaseProviderService>();
            DataContext = this;

public partial class CompanyMapper : Window, INotifyPropertyChanged

private CompanyMapperDto _companyMapperDto;

        public CompanyMapperDto CompanyMapperDto
        {
            get { return _companyMapperDto; }
            set
            {
                _companyMapperDto = value;
                OnPropertyChanged(nameof(CompanyMapperDto));
            }
        }