C#: What is the difference between var and explicit type?

var — implicit type. Explicit — named type.

var:

1var name = "Alice";      // string
2var age = 30;            // int
3var list = new List<string>();   // List<string>

Explicit type:

1string name = "Alice";
2int age = 30;
3List<string> list = new List<string>();

When to use var:

• Type is obvious from right side.
• Long type names (generics).
• LINQ queries.
• Anonymous types.

When to use explicit type:

• Type not obvious.
• Need specific interface.
• Fields, method signatures.