I'm new in wfp. In my sample application I'm using a ListView to display contents of property. I don't know how to bind SelectedItem in ListView to property and then bind to TextBlock. 
Window.xaml
<Window x:Class="Exec.App"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Main window" Height="446" Width="475" >
    <Grid>
        <ListView Name="ListViewPersonDetails" Margin="15,12,29,196" ItemsSource="{Binding Persons}" SelectedItem="{Binding CurrentSelectedPerson}">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="FirstName" DisplayMemberBinding="{Binding FstNamePerson}"/>
                    <GridViewColumn Header="LastName" DisplayMemberBinding="{Binding SndNamePerson}"/>
                    <GridViewColumn Header="Address" DisplayMemberBinding="{Binding AdressPerson}"/>
                </GridView>
            </ListView.View>
        </ListView>
        <TextBlock Height="23" Name="textFirstNameBlock" FontSize="12" Margin="97,240,155,144">
                <Run Text="Name: " />
                <Run Text="{Binding CurrentSelectedPerson.FstNamePerson}" FontWeight="Bold" />
        </TextBlock>
        <TextBlock Height="23" Name="textLastNameBlock" FontSize="12" Margin="97,263,155,121">
                <Run Text="Branch: " />
                <Run Text="{Binding CurrentSelectedPerson.SndNamePerson}" FontWeight="Bold" />
        </TextBlock>
        <TextBlock Height="23" Name="textAddressBlock" FontSize="12" Margin="0,281,155,103" HorizontalAlignment="Right" Width="138">
                <Run Text="City: " />
                <Run Text="{Binding CurrentSelectedPerson.AdressPerson}" FontWeight="Bold" />
        </TextBlock>
    </Grid>
</Window>
MainWindow.xaml.cs
Tman manager = new Tman();
        private List<Person> persons;
        public List<Person> Persons
        {
            get
            {
                return this.persons;
            }
            set
            {
                if (value != null)
                {
                    this.persons = value;
                    this.NotifyPropertyChanged("Data");
                }
            }
        }
        private Person currentSelectedPerson;
        public Person CurrentSelectedPerson
        {
            get
            {
                return currentSelectedPerson;
            }
            set
            {
                this.currentSelectedPerson = value;
                this.NotifyPropertyChanged("CurrentSelectedItem");
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(string propertyName)
        {
            var handler = this.PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
        private void Window_Loaded(object sender, RoutedEventArgs e){   
            ListViewPersonDetails.ItemsSource= manager.GetPersons();
        }
Person.cs
class Person
    {
        public string FirstName
        {
            get;
            set;
        }
        public string LastName
        {
            get;
            set;
        }
        public string Address
        {
            get;
            set;
        }
    }
Thanks for any help.