override -- C# Keyword

override -- C# Keyword

•  The override modifier is required to extend or modify the abstract or virtual implementation of an inherited method, property, indexer, or event.
• An override declaration cannot change the accessibility of the virtual method.
• Both the override method and the virtual method must have the same access level modifier.
• You cannot use the new, static, or virtual modifiers to modify an override method.

out -- C# Keyword

out -- C# Keyword

• This keyword implemented from VS 2010
•  The out keyword specifies that the type parameter is covariant.
• You can use the out keyword in generic interfaces and delegates.

interface <interface Name><out R> { }