You have a custom type, but you know nothing about that type, Learning to use ToString solves that problem.
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Code Contracts in .NET
This article introduces code contracts that specify statements in .NET programs that must prove valid.
Can You Hear Me Now?
Three aspects of .NET programming can make debugging and testing a ton of fun and help you come off as a real pro when you deliver bulletproof code.
Additional Debugging Techniques in C#
An expansion on Debugging tips provided by others.
Debugging Techniques in C#
A method for displaying debug statements during runtime.
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Become more proficient on the usage of statements to control the flow of execution through a C++/CLI application.

Using File Functions in .NET
There's lot's more hidden under the surface of file functions than might appear at first glance.

Making a Countdown App (Timer)
Count up or count down. Learn how to do it all with Visual Basic.
Maker Project: Creating a Garage Door Opener
Have you ever wanted to control your garage door from your smartphone? Here is your chance. Get your hands dirty with an Arduino Garage Door Controller.