triadathereal.blogg.se - Visual studio 2015 intellisense object properties

Can be used to require functionality and typing that doesn't exist yet and still accomplish type safety.

Abstract classes cannot be instantiated and can have abstract members (must be provided by subclass).

Without a virtual and override keyword on overwritten methods or variables, which method actually gets called when accessing an object's methods is based upon the context of the expected type.

The Object type is accessible via the keyword 'object'.

NET if a class is created without an inheritance relationship it is implicitly inheriting System.Object

System.Object is the ultimate base class for any object in.

As long as an object inherited from a type, it can be used in place of its base type(s).

In the generic example above, a variable of type A is allowed to be assigned to an object of type B or C.Ĭan call parent members using keyword 'base' (similar to 'this'). Can use abstract classes / interfaces to avoid use.ĭerived types can be assigned to variables of the type of its parents. Need to be cautious with inheritence, because you can easily tie yourself up with your implementation and gridlock your coding patterns.

Public class SomeEventEventArgs : EventArgs Only one inheritence per line allowed, but you can chain inheritence on separate lines for an unlimited depth. Static void writeResult( string description, float result)Ĭonsole.