Binding items of a list in datatemplate in WPF

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C#

XML

WPF

DataTemplate

Binding

Hi, I am trying to learn WPF. The DataContext is set to ViewModel. In Itemscontrol I am getting a list<string> named"MyList". By default the datacontext of datatemplate would be string. So I modified the datacontext of TextBlock to Viemodel to access the property MyWidth which is binded to "Width". Actually the number of values of "MyWidth" is equal to number of elements in the list "MyList".MyWidth is also a list.Now I do not know how I can get all the values of MyWidth.
Cold you please help me out. I will be grateful to you guys.

What I have tried:

<ItemsControl ItemsSource="{Binding MyList}">
                   <ItemsControl.ItemsPanel>
                       <ItemsPanelTemplate>
                           <StackPanel Name="horizontalLabels" Orientation="Horizontal"  />

                       </ItemsPanelTemplate>
                   </ItemsControl.ItemsPanel>
                   <ItemsControl.ItemTemplate>
                       <DataTemplate>

                           <TextBlock     Text="{Binding}"

                                         Width="{Binding DataContext.LabelWidth, RelativeSource={RelativeSource AncestorType=ItemsControl},UpdateSourceTrigger=PropertyChanged}"
                                          Background="Red" Height="30"  FontSize="12"

                                           >
                           </TextBlock>

                       </DataTemplate>
                   </ItemsControl.ItemTemplate>
               </ItemsControl>

public void AddLabels(double parameters)
        { MyList.Add("dummy");
MyWidth.Add(30);
MyList.Add("dummy2");
MyWidth.Add(60);}