c# - What is the default equality comparer for a set type? -

In the MSDN API, for the constructor with no argument it says

A new instance Starts the hashaset class which is empty and compares the default similarity to the set type.

Comparison of default likeness for the set type, e.g. For a custom class?

BTW: Is it just me or is the MSDN API document actually a bit thin on clarification? When I read it I scream about more than one question.

This means that it will use the returned comparator, the element type of the set T < For / code>.

As the documentation:

The default property checks that the Type T system implements. The IEquatable interface and, if so, gives a similarity operator that uses the implementation otherwise, it gives an equity compaer that uses the override of the object. Acquires and Objects GetHashCode T.

, so for your custom type, it will use the GetHashCode method that you have defined to locate the item in the set . If you have IEquatable & lt; T & gt; is implemented, then it is Iquatable & lt; T & gt; .Equals (T) will use for parallelism, else it will use your similar (