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--- csharp [2020/04/13 19:20]
paul created
+++ csharp [2020/04/17 03:06] (current)
paul [var]
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 ====== C# ======
+C# is a general-purpose, multi-paradigm programming language encompassing strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines. It was developed around 2000 by Microsoft as part of its .NET initiative.
+C# was designed by Anders Hejlsberg, and its development team is currently led by Mads Torgersen.
+==== var ====
+C# is a strongly typed language which means, you must declare a variable type before you can use it. But what if you don’t know the type of the variable? C# lets you declare local variables without giving them explicit types. It is possible with the help of the “var” type variable.
+The “var” keyword is used to declare a var type variable. The var type variable can be used to store a simple .NET data type, a complex type, an anonymous type, or a user-defined type.
+==== Interfaces ====
+A C# interface is a collection of things that we promise to put in our class if we decide to use that interface.
+Let's say we have a cat. We can make an interface that a cat can implement, but also dogs, and other animals.
+For example we can have an interface called IWalk, ISleep or IEat.