NullReferenceException#

A NullReferenceException (NRE) occurs when code tries to access a member of an unassigned variable.

Declaring a reference variable does not automatically assign it a value.

Troubleshooting#

• I don't understand stack traces.
• I don't understand reference types.
• I don't understand access.
• I don't understand debugging.
• I understand all of the above.