Custom exception classes in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a custom exception class named MyException.

C Sharp (C#)

public class MyException : [1] { }

Drag options to blanks, or click blank then click option'

AException

BError

CBaseException

DSystemException

Attempts:

3 left

💡 Hint

Common Mistakes

Using Error or BaseException which are not valid base classes in C#.

Forgetting to inherit from any class.

The custom exception class should inherit from Exception to behave like a standard exception.

2fill in blank

medium

Complete the constructor to call the base Exception constructor with a message.

C Sharp (C#)

public class MyException : Exception {
    public MyException(string message) : [1](message) { }
}

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Athis

Bsuper

Cbase

Dparent

Attempts:

3 left

💡 Hint

Common Mistakes

Using this instead of base, which calls the current class constructor.

Using super or parent which are not C# keywords.

Use base to call the constructor of the parent Exception class with the message.

3fill in blank

hard

Fix the error in the custom exception class by adding the missing constructor for serialization.

C Sharp (C#)

using System;
using System.Runtime.Serialization;

[Serializable]
public class MyException : Exception {
    public MyException(string message) : base(message) { }
    protected MyException(SerializationInfo info, [1] context) : base(info, context) { }
}

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ASerializationContext

BContext

CStreamContext

DStreamingContext

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter types like SerializationContext or Context.

Omitting the protected constructor needed for serialization.

The protected constructor for serialization requires a StreamingContext parameter.

4fill in blank

hard

Fill both blanks to complete the custom exception class with a default constructor and a message constructor.

C Sharp (C#)

public class MyException : Exception {
    public MyException() : [1]() { }
    public MyException(string message) : [2](message) { }
}

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Abase

Bthis

Csuper

Dparent

Attempts:

3 left

💡 Hint

Common Mistakes

Using this instead of base, which calls another constructor in the same class.

Using super or parent which are not valid in C#.

Both constructors should call the base Exception constructors using base.

5fill in blank

hard

Fill all three blanks to complete the custom exception class with default, message, and serialization constructors.

C Sharp (C#)

using System;
using System.Runtime.Serialization;

[Serializable]
public class MyException : Exception {
    public MyException() : [1]() { }
    public MyException(string message) : [2](message) { }
    protected MyException(SerializationInfo info, [3] context) : base(info, context) { }
}

Drag options to blanks, or click blank then click option'

Abase

Bthis

CStreamingContext

DSerializationContext

Attempts:

3 left

💡 Hint

Common Mistakes

Using this instead of base for constructors.

Using wrong parameter type for serialization constructor.

The default and message constructors call base, and the serialization constructor uses StreamingContext as the parameter type.