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Home>IT Tests>Questions>How to check if a variable is undefined in C#

Question from the C# Winforms test

How to check if a variable is undefined in C#

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You are developing a Windows WPF application. You have defined the following elements in your XAML code (below). You want to add a button to the StackPanel (line 11) and assign it the style MyBlueStyle. How will you define your button?

Author: Guillaume BroutStatus: PublishedQuestion passed 215 times
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