Can an abstract class have static methods?

Yes You cant have static method as concrete method in abstract class . But not as abstract method cause static method cannot be overridden.

Oui

Yes

Yes,Because static method can be invoked without creating the instance of the class. eg. namespace Rextester { public abstract class Abstractclass { public static void staticdemo() { Console.WriteLine("welcome static method "); } } public class Program { public static void Main(string[] args) { //Your code goes here Console.WriteLine("Hello, world!"); Abstractclass.staticdemo(); } } } result: - Hello, world! welcome static method

a static member can not in marked as virtual ,override or abstract.

However, for the same reason, you can't declare a static method to be abstract. Normally, the compiler can guarantee that an abstract method will have a real implementation any time that it is called, because you can't create an instance of an abstract class. But since a static method can be called directly, making it abstract would make it possible to call an undefined method.

No

yes

static methods do not have an instance. So, you can have a static method in an abstract class

Yes

We actually override static methods, it's a bit ugly, but it works just fine for our needs. ... Abstract methods require an instance, but static methods do not have an instance. So, you can have a static method in an abstract class, it just cannot be static abstract (or abstract static)

Yes, abstract class can have Static Methods. The reason for this is Static methods do not work on the instance of the class, they are directly associated with the class itself. So if you write a static method in the class and compile it, and when you try to view the IL, it will be same as any other class accessing the static member.