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Bruce GustFlag for United States of America

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Why is some text in blue in Visual Studio?

Brand new to .NET. Making my way through some tutorials right now and I have a question:

What's the significance of the text that's in blue?

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"Startup" is a class. Is that why it's in blue?

What's the significance of "I," in "IHostingEnviornment" or "IConfigurationBuilder" or "IEnumerable." Are those systemic functionalities and what's the significance of them being written in blue?

Just trying to connect the dots...

Thanks!
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Paul MacDonald
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In Visual Studio:
     Tools -> Options -> Environment -> Fonts and Colors

In the example you posted, the coloring is highlighting user types, but the coloring is arbitrary.  It's there to make it more readable and easier to troubleshoot.
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Thanks, Paul!
You refer to them as user types. Is that interchangeable with Interfaces (IHostingEnvironment, IConfiguration)? What is a user type?
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Paul MacDonald
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Thanks!
Happy to help.  Thanks for the points!