C Sharp (C#) - Exception Handling
Which of the following correctly defines a custom exception class named
ConnectionFailedException in C#?Which of the following correctly defines a custom exception class named ConnectionFailedException in C#?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Check inheritance
The custom exception must inherit fromException.Step 2: Check constructor syntax
The constructor should call the base class constructor with the message parameter.Step 3: Evaluate options
public class ConnectionFailedException : Exception { public ConnectionFailedException(string message) : base(message) {} } correctly inherits and calls base constructor. public class ConnectionFailedException { public ConnectionFailedException(string message) { this.message = message; } } lacks inheritance and uses invalid message assignment. class ConnectionFailedException : Exception { public void ConnectionFailedException(string msg) { base(msg); } } uses a method instead of a constructor and incorrectly calls base. public class ConnectionFailedException : Exception { public ConnectionFailedException() { base(); } } calls base parameterless constructor but lacks message parameter.Final Answer:
Option A -> Option AQuick Check:
Custom exceptions inherit Exception and call base(message) [OK]
Quick Trick: Inherit Exception and call base(message) constructor [OK]
Common Mistakes:
MISTAKES- Not inheriting from Exception
- Not calling base constructor with message
- Using method instead of constructor
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