C Sharp interview Questions Part 4

C Sharp Interview Questions Part 8

C Sharp – Interview Questions

What is the use of conditional preprocessor directive in C#?

You can use the #if directive to create a conditional directive. Conditional directives are useful for testing a symbol or symbols to check if they evaluate to true. If they do evaluate to true, the compiler evaluates all the code between the #if and the next directive.


Which class acts as a base class for all exceptions in C#?

C# exceptions are represented by classes. The exception classes in C# are mainly directly or indirectly derived from the System.Exception class. Some of the exception classes derived from the System.Exception class are the System.ApplicationException and System.SystemException classes.


What is the difference between System.ApplicationException class and System.SystemException class?

The System.ApplicationException class supports exceptions generated by application programs. Hence the exceptions defined by the programmers should derive from this class.

The System.SystemException class is the base class for all predefined system exception.