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Classes are reference types on the heap
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Properties expose get and set accessors like fields but with control.
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var still has a compile-time type
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It lets a method accept a variable number of arguments as an array.
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Enums give named integer constants for a closed set of values.
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throw keeps the original stack trace when rethrowing.
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List grows dynamically and has helpful methods.
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Any can stop at the first match.
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It overrides base appsettings for the Development environment.
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It redirects HTTP requests to HTTPS.
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Both persist tracked changes
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Constructor injection makes required dependencies obvious and testable.
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Interpolation is readable and compile-checked for expressions.
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It holds local launch profiles, URLs, and env vars for Visual Studio and dotnet run.
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It stops a dependency from flowing transitively to consumers.
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A value-type record with value equality semantics.
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Boxing wraps a value type in an object on the heap
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string is immutable so each change may allocate a new string.
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It lets you write asynchronous methods with await.
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It flags possible nulls at compile time when nullable context is on.
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