non-static variable .. cannot be referenced from a static context
1605
What is the reason behind "non-static method cannot be referenced from a static context"?
31737
Why aren't static data members allowed in local classes?
79586
System.NullPointerException: Attempt to de-reference a null object
131864
Member '' cannot be accessed with an instance reference
134010
Can Visual Studio tell me which reference threw a NullReferenceException?
158951
What makes a static variable initialize only once?
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
37988
System.NullPointerException: Attempt to de-reference a null object:
136377
How can I get a list of static variables in a class?
165
Reference could not be added because of same name
114816
Is null reference possible?
104694
Non-static method requires a target
133927
Java variable might not have been initialized?
99364
Why is Python class not recognizing static variable
6912
Cannot access non-static field
52703
Error message Strict standards: Non-static method should not be called statically in php
45188
How do I pass a variable by reference?