Step 1: Add a page in your Windows Phone Project named as ‘Concatenation.xaml’
Step 2: Add some controls on the page from Toolbox as mentioned below:
· Add 2 Textboxes with name=’TextBox1’, name=’TextBox2’ and Text=’’
· Add 1 Button with Content=’Concatenate’
· Add 1 TextBlock with name=’TextBox1’ and Text=’’