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What is optional parameter in C# with example?
Optional arguments enable you to omit arguments for some parameters. Both techniques can be used with methods, indexers, constructors, and delegates. When you use named and optional arguments, the arguments are evaluated in the order in which they appear in the argument list, not the parameter list.
Does C# have optionals?
C# doesn’t have it. But reference types are already nullable, why is this needed? For the record C# does not have “basic types” it has “value types” including user defined value types.
Is default argument in C?
In C/C++ it is possible to define default values for all or some arguments of a function. If such default values are specified for a function, one does not have to specify the corresponding argument when invoking this function: if argument is not specified, the default value will be used.
Are there optional parameters on overridden methods in C #?
Resharper warns you simply not to have changes to the default value in an override, if that helps ;p Of course, resharper also tells you the this. is redundant, and offers to remove it for you which changes the behaviour – so resharper also isn’t perfect. It does look like it could qualify as a compiler bug, I’ll grant you.
When are arguments omitted from a function member?
When arguments are omitted from a function member with corresponding optional parameters, the default arguments of the function member declaration are implicitly passed. The “corresponding optional parameter” is the bit that ties 7.5.2 to 7.5.1.1.
When to use base methods or override methods?
There’s some conflict here…. it states that the base methods are not used if there is an applicable method in a derived class – which would lead us to the derived method, but at the same time, it says that methods marked override are not considered. But, §7.5.1.1 then states:
Why is mymethod not called at run time?
At run-time, MyMethod (string) is called with the argument “aaa”. Because there is a overridden form, that is the form called, but it is not called with “bbb” because that value has nothing to do with the run-time implementation but with the compile-time definition.