The Var Keyword- Implicitly Typed Local Variables

The var keyword has been introduced to C# 3.0. When the compiler encounters a var keyword, it implicitly initialize the variable to the type of the initialization expression. For example, if the compiler sees var s = "dummy string" it converts it to string s = "dummy string".

Therefore, an implicitly typed variable must be initialized. For example,
var s
is not a legal declaration.

The var keyword can not be used as a function parameter

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