c# - Is it necessary to explicitly inherit from object? -

this question has answer here:

• redundant inherit object in c#? 6 answers

in this msdn example, class explicitly inherits object:

class point: object {    // ... } 

is explicitly inheriting object ever necessary? is, not equivalent following?

class point: object {    // ... } 

no, implicitly inherited. why every class in c# has .tostring() , .equals().

https://msdn.microsoft.com/en-us/library/vstudio/system.object%28v=vs.100%29.aspx object class: "this ultimate base class of classes in .net framework; root of type hierarchy."

this type of inheritance derived single class called "unified type system"