You are developing a Windows Presentation Foundation (WPF) application that displays pricing and inventory Information.
A list box's ItemsSource property has decimal and string types. Decimals represent price and strings represent messages such as "Discontinued"
The following markup is defined as follows. (Line numbers are included for reference only.)

You need to ensure that data templates are used to format the strings without changes and the decimals as currency.
Which markup segment should you insert at line 05?

• A. <DataTemplate DataType="(x: Type clr:String)">
  <TextBlock
  Text="{Binding StringFormat=Item Error: <0}}" />
  </DataTemplate>
  <DataTemplate DataType="{x:Type clr:Decimal}">
  <TextBlock
  Text="{Binding StringFormat=Item Price: <0:C}}" />
  </DataTemplate>
• B. <DataTemplate x:Key "String" Template-"clr :String">
  <TextBlock
  Text="{Binding ScringForwac=Item Error: {0}}" />
  </DataTemplate>
  <DataTemplate x : Key= "clr: Decimal "><TextBlock
  Text="{Binding StringFormat=Item Price: <0:C}}" /></DataTemplate>
• C. <DataTemplate x:Key="clr:String">
  <TextBlock
  Text="{ Binding StringFormat=Itein Error: {0}}"/>
  </DataTemplate>
  <DataTeroplate x:Key="clr:Decirrtal"><TextBlock
  Text="{Binding StringFormat=Item Price: {0:C}}" />
  </DataTemplat.e>
• D. <DataTemplate DataType="clr:String"><TextBlock
  Text="{Binding StringFormat=Item Error: {0}}" /></DataTemplate>
  <DataTemplate DataType "clr:Decimal"><TextBlock
  Text="{Binding StringFormat=Item Price: {0:C}}" /></DataTemplate>
• E. <DataTemplate x:Key="Scring" Template="clr:String">
  <TextBlock
  Text="{Binding StringFormat=Item Error: <0}}" />
  </DataTemplate>
  <DataTemplate x: Key="Decimal" Template="clr:Decimal ">
  <TextBlock
  Text="{Binding StringFormat Item Price: <0:C}>" />
  </DataTemplate>

You use Microsoft .NET Framework 4 to create a Windows Forms application.
You add a new class named Customer to the application. You select the Customer class to create a new object data source.
You add the following components to a Windows Form:
- A BindingSource component named customerBindingSource that is data-bound to the Customer object data source.
- A set of TextBox controls to display and edit the Customer object properties. Each TextBox control is data-bound to a property of the customerBindingSource component.
- An ErrorProvider component named errorProvider that validates the input values for each TextBox control.
You need to ensure that the input data for each TextBox control is automatically validated by using the ErrorProvider component.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Implement the validation rules inside the Validating event handler of each TextBox
  control by throwing an exception when the value is invalid.
• B. Add the following code segment to the InitializeComponent method of the Windows
  Form.
  this.errorProvider.DataSource = this.customerBindingSource.DataSource;
  this.errorProvider.DataMember = this.customerBindingSource.DataMember;
• C. Implement the validation rules inside the setter of each property of the Customer class
  by throwing an exception when the value is invalid.
• D. Implement the validation rules inside the TextChanged event handler of each TextBox
  control by throwing an exception when the value is invalid.
• E. Add the following code segment to the InitializeComponent method of the Windows
  Form.
  this.errorProvider.DataSource = this.customerBindingSource;

You are developing an XBAP application for your company intranet. During several development iterations, you manually copy the working executable, application, and deployment manifest files to the test Web server. You create an HTML file that has a hyperlink to the deployment manifest that you use for testing. During the next iteration, you enhance the XBAP application by making changes to the application.
When you use the hyperlink to the deployment manifest to test the deployment, you do not see the changes.
You need to ensure that the changes you make are visible when you test the deployment from your machine.
What should you do?

• A. Delete the application, deployment, and executable files from the Web server. Then rebuild the XBAP solution and manually copy the same files from the project bin directory to the Web server and click the Install hyperlink again.
• B. Delete the application, deployment, and executable files from the Web server. Then recopy the same files from the project bin directory to the Web server, restart IIS, and click the Install hyperlink again.
• C. Restart Microsoft Internet Information Services (IIS). Then click the Install hyperlink again.
• D. Open a Visual Studio command prompt and run mage -cc. Then click the Install hyperlink again.

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code segment. (Line numbers are included for reference only.)

You add the following code fragment within a WPF window control.

The TextBox control is data-bound to an instance of the Contact class.
You need to ensure that the Contact class contains a business rule to ensure that the ContactName property is not empty or NULL. You also need to ensure that the TextBox control validates the input data.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two).

• A. Option D
• B. Option B
• C. Option C
• D. Option A