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There is no wrapping property available for button content so if you want to have wrapping content inside button use textblock control inside button control. Then apply wrapping for textblock text as shown in the below xaml code.

XAML Code to wrap content inside a xaml button control used for wpf and windows store apps

 <Button   Height="190" Width="296">
                            <TextBlock TextWrapping="Wrap" TextAlignment="Center">Content to be wrapped inside button goes here</TextBlock>
</Button>

Code in resource dictionary to mention an image as source to use in all pages as background image

 <!--Background image for all pages-->
    <ImageBrush x:Key="BgImage" ImageSource="Images/InnerBg.png"></ImageBrush>

This code is used to add an app bar in a xaml page.
That app contains 3 buttons.
Appbar button inside secondary commands tag are known as global commands and are displayed on the right side of the appbar.
For this three buttons styles are written in sepearate resource dictionary file.
label property is used to give the name below the appbar button and icon is used to mention the image icon to be displayed in the appbar button.
3 rd button style contains content template with image source to display custom image in appbar button.

To use global style written in seperate resourcedictionary page in every page of your application you have to include the below xaml tags in app.xaml page.

Code in App.xaml page

<Application
    x:Class="BSNFRailway.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:BSNFRailway">

    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="BSNFResources.xaml"></ResourceDictionary>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

XAML Code for app bar in MainPage.xaml

 <Page.BottomAppBar>
        <CommandBar>
            <AppBarButton Style="{StaticResource AppBarRefreshButtonStyle}" />

            <CommandBar.SecondaryCommands>
                <AppBarButton Style="{StaticResource AppBarFilterButtonStyle}" />
                <AppBarButton Label="Asset Tree" Style="{StaticResource AppBarAssetTreeButtonStyle}" >
                  
                </AppBarButton>
            </CommandBar.SecondaryCommands>
        </CommandBar>
    </Page.BottomAppBar>

Code in ResourceDictionary.xaml page

<Style x:Key="AppBarFilterButtonStyle" TargetType="AppBarButton" >
        <Setter Property="Label" Value="Filter" ></Setter>
        <Setter Property="Icon" Value="Filter" ></Setter>
    </Style>
    
    <Style x:Key="AppBarRefreshButtonStyle" TargetType="AppBarButton" >
        <Setter Property="Label" Value="Refresh" ></Setter>
        <Setter Property="Icon" Value="Refresh" ></Setter>
    </Style>
  
    <Style x:Key="AppBarAssetTreeButtonStyle" TargetType="AppBarButton">
        <Setter Property="ContentTemplate">
            <Setter.Value>
                <DataTemplate>
                    <Image Source="/Images/TreeLogo.png" />
                </DataTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="Label" Value="Tree" />
    </Style>

In TFS

we can see My Work in which you can find different categories like

In Progress Work

Suspended Work

Available Work Items

Code Reviews

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Open Query in Available Work Items is used to view work.

To assign task to team mates 

In Available work items - New - Task - enter details of task and assign task to you - Save it and refresh My Work in TFS to see the newly added task under available work items.