EF Non-static method requires a target

Question

I\'ve serious problems with the following query.

context.CharacteristicMeasures
        .FirstOrDefault(cm => cm.Charge == null &&
                        


        

Answer 1

Try moving newAreaItem == null outside of the query

bool newAreaItemIsNull = (newAreaItem == null);

and replace newAreaItem == null with newAreaItemIsNull in query.

Query parser can only operate with the objects in the database, and newAreaItem is not one of them.