Menu
Is there a performance difference at all between importing an entire namespace versus using aliasing to import only one class? If so, how much of a difference is it?
Examples:
Importing an entire namespace:
using System.Reflection;
Aliasing to import only one class:
using BindingFlags = System.Reflection.BindingFlags;
313
The using directive can appear: At the beginning of a source code file, before any namespace or type declarations.
Namespaces in C# serve two main purposes: to organize classes and functionality and to control the scope of classes and methods. Type aliasing is a little known feature for C# and it comes in handy when you would like to alias a specific method or class from a namespace for the sake of clarity.
The namespace keyword is used to declare a scope that contains a set of related objects. You can use a namespace to organize code elements and to create globally unique types.
In C# you import namespaces, not classes. If the class you are working in is in the same namespace, you don't need to do anything. If its in a different namespace and you are using Visual Studio, just type the name of the class and use the smart tag drop down to add the appropriate using to the top of the class file.
Zero. Namespace imports are a compile-time feature and the generated IL will be exactly the same either way.
138
No it is just an help for the programmer, the CIL generated by the compiler is exactly the same.
5
There's no performance difference. One says 'look here when I specify a class name, it might be in here'. The other says 'when I say this class or namespace, I mean use this one'.
3
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
