update index.md (#20623)

Added "no multiple inheritance" to Rules of Inheritance.
This commit is contained in:
Karol Skrobot
2018-11-01 04:08:37 +00:00
committed by Christopher McCormack
parent d6d2578495
commit 4e92b01111

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@ -18,6 +18,8 @@ Inheritance is one way. The base class does not inherit the features of the deri
Inheritance is transitive. A Base class of 'Animal' can have a derived class of 'Dog' and this can have a derived class of 'Terrier'. The Terrier class will inherit both the features of the Dog class and the Animal class.
C# does not support multiple inheritance. A class can only inherit from a single class.
# The `:` symbol
In C# the `:` symbol is used to denote inheritance. This is called when creating the derived class.