Difficulty: Easy
Correct Answer: using System.Windows.Forms;\nusing CtrlChars = Microsoft.VisualBasic.ControlChars;\nMessageBox.Show('Wait for a' + CtrlChars.CrLf + 'miracle');
Explanation:
Introduction / Context:
This question checks your understanding of namespace aliasing in C# and correct usage of ControlChars for Windows Forms message boxes.
Given Data / Assumptions:
Concept / Approach:
In C#, you can create a namespace/type alias with the syntax using Alias = Fully.Qualified.Type;
. Then, reference members through that alias (for example, Alias.CrLf
).
Step-by-Step Solution:
Verification / Alternative check:
You can also use Environment.NewLine instead of VB ControlChars; both produce a newline in Windows.
Why Other Options Are Wrong:
A uses alias but references CrLf without the alias; B and C attempt invalid variable-style aliasing; E is valid code but does not answer the exact instruction to use ControlChars alias.
Common Pitfalls:
Confusing VB constants with C# literals, or writing using Microsoft.VisualBasic.ControlChars;
(not valid) instead of a proper alias.
Final Answer:
using System.Windows.Forms; using CtrlChars = Microsoft.VisualBasic.ControlChars; MessageBox.Show('Wait for a' + CtrlChars.CrLf + 'miracle');
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