Check using directive reference in Visual Studio [duplicate]

Answer 1

Normally just check your using. Visual Studio only allow a method/class call from one Namespace. If there are two more more method of the same name in multiple of your Namespace that you are using, Visual Studio will force you to specify the Namespace explicative in your call.

i.e.

using Name1;
using Name2;

namespace Class1 {
    class Testing {
        public Testing {
            // this method only exists in Name1
            Method1 ( );
            // this method exist in both Name1 and Name2
            Name1.Method2 ( );
            Name2.Method2 ( );
        }
    }
}

So if you see only

using SomeNamespace;

you will know that any classes that may come from that namespace is specifically from SomeNamespace. If there was another class of that same name but also in a different namespace, Visual Studio will force you to type in that namespace when calling.

So if you see that you usings are normal and there are no random

RandomNamespace.Class1 class1 = new RandomNamespace.Class1 ( );

You know for sure that nothing is out of the ordinary.

Answer 2

you want to know if a imported namespace is neccessary to be imported, because types from that namespace are used? if its that have a look in the addon "Productivity power tools" e.g. There is an option to remove and sort usings on save