Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Knud Back1,248 Points
Help understanding the fundamentals of C# syntax
It seems like there is two different ways to make method calls in C#. By different I mean the order of namespace class and method. Is there a general rule regarding when to use each "style".
Example: string my_variable
The first way System.Console.Writeline(my_variable) This call follows the order namespace.class.method(variable)
The second way my_variable.ToLower() This call follows the order variable.method
I am not sure how to Google this question. Therefore I would appreciate any help
Steven Parker220,696 Points
The difference is class method vs. instance method.
Your first example is a class (or "static") method which may have up to the 3 parts you mentioned. It might not need them all, depending on where the call is being made and what using statements have been done, but will always have the method name.
The second example is of an instance method, which is called on a specific instance of a class represented by a variable. The namespace and class are determined by the variable, so only the method name is used. In your example they are System.String.