Type of methods in C#

Question

Hi everybody. I'm very beginner in programing.
My question is:
Let's say we defined a char variable.
char c = '8';
There are some methods appear when we write char.
e.g. char.IsNumber(c);
And there are some other methods when we write c.
e.g. c.Equals();
What i'm wondering is the difference between these methods.
I mean what is that i'm using when i write char., and when i write c?

Answer 1

Thanks a lot.
So can we say that,
the methods like
string.Compare()
string.Format()
are static methods.
While the methods like
str. CopyTo()
str.IndexOf()
are instance methods?

Answer 2

Thank you. 😊