Instance Memebers(Class level Members)

Yes, you can initialize instance variables (or fields) of classes when they are defined:

class MyClass
{
    public int MyInt = 3; 
    public string MyString = "Hello";

    // etc
}

If you don't initialize them , then they have their default values of 0 (numbers), false (bool) or null (reference types).

Notice though that you can't do this for structs. You have to use the constructor.