What that means is that it describes the shape of the constructor You are right it is a type It is the type of a class whose constructor takes in no arguments New does not guarantee heap allocation and simply avoiding new does not guarantee stack allocation New is always used to allocate dynamic memory, which then has to be freed By doing the first option, that memory will be automagically freed when scope is lost.
According to this reference for operator new Global dynamic storage operator functions are special in the standard library All three versions of operator new are declared in the global namespac. If the new() generic constraint is applied, as in this example, that allows the class or method (the authenticationbase<t> class in this case) to call new t() To construct a new instance of the specified type There is no other way, short of reflection (this includes using system.activator, to construct a new object of a generic type.
So what do you call just the new part of it In the specific case of throw, throw new() is a shorthand for throw new exception() As you can see, there are quite a few places where it can be used (whenever the type to be created can be inferred) to make code shorter The place where i like it the most is for fields/properties: Note that if you declared it var a = new { } And var o = new object();, then there is one difference, former is assignable only to another similar anonymous object, while latter being object, it can be assigned to anything.
The introduction documents dedicate many paragraphs to explaining the difference between new() and make(), but in practice, you can create objects within local scope and return them To do this, define a new class that inherits exception, add all four exception constructors, and optionally an additional constructor that takes an innerexception as well as additional information, and throw your new exception class, passing ex as the innerexception parameter.
OPEN
