30 C# Basic Exercises for Intermediate with Solutions

Master intermediate C# skills with our comprehensive list of top 30 exercises. Dive into coding challenges that improve your understanding and proficiency in C#, setting a solid foundation for advanced challenges. Start your journey to C# mastery today!

Learning Objectives:

Exercise Instructions:

Start with the first exercise and attempt to solve it before checking the hint or solution.
Ensure you understand the logic behind each solution, as this will help you in more complex problems.
Use these exercises to reinforce your learning and identify areas that may require further study.

1. Write a program to calculate the sum of all prime numbers between two hardcoded numbers.

Required Input:

Range: 10 to 30

Expected Output:

Sum of Prime Numbers: 112

Code In C#

using System; class PrimeSum { static void Main() { // Calculate the sum of all prime numbers in the range } }

Run Code?

Click Run Button to view compiled output

2. Create a program to check if a given string is an anagram of another hardcoded string.

Required Input:

Strings: "listen" and "silent"

Expected Output:

Is Anagram: True

Code In C#

using System; class CheckAnagram { static void Main() { // Check if the two strings are anagrams } }

Run Code?

Click Run Button to view compiled output

3. Write a program to find the second smallest number in a hardcoded array.

Required Input:

Array: [4, 2, 9, 1, 5]

Expected Output:

Second Smallest: 2

Code In C#

using System; class SecondSmallest { static void Main() { // Find the second smallest number in the array } }

Run Code?

Click Run Button to view compiled output

4. Create a program to remove all vowels from a hardcoded string and print the result.

Required Input:

String: "programming"

Expected Output:

String without Vowels: prgrmmng

Code In C#

using System; class RemoveVowels { static void Main() { // Remove vowels from the string } }

Run Code?

Click Run Button to view compiled output

5. Write a program to count the frequency of each element in a hardcoded array.

Required Input:

Array: [1, 2, 2, 3, 1, 4]

Expected Output:

Frequencies:
1: 2
2: 2
3: 1
4: 1

Code In C#

using System; using System.Collections.Generic; class FrequencyCounter { static void Main() { // Count the frequency of elements in the array } }

Run Code?

Click Run Button to view compiled output

6. Create a program to generate all permutations of a hardcoded string.

Required Input:

String: "abc"

Expected Output:

Permutations:
abc
acb
bac
bca
cba
cab

Code In C#

using System; class StringPermutations { static void Main() { // Generate all permutations of the string } }

Run Code?

Click Run Button to view compiled output

7. Write a program to check if a hardcoded 2D array is symmetric along its diagonal.

Required Input:

Matrix:
[ [1, 2, 3],
 [2, 4, 5],
 [3, 5, 6] ]

Expected Output:

Is Symmetric: True

Code In C#

using System; class SymmetricMatrix { static void Main() { // Check if the matrix is symmetric along its diagonal } }

Run Code?

Click Run Button to view compiled output

8. Create a program to sort a hardcoded array in descending order without using built-in methods.

Required Input:

Array: [5, 2, 9, 1, 7]

Expected Output:

Sorted Array: 9, 7, 5, 2, 1

Code In C#

using System; class DescendingSort { static void Main() { // Sort the array in descending order } }

Run Code?

Click Run Button to view compiled output

9. Write a program to calculate the sum of digits of all numbers in a hardcoded array.

Required Input:

Array: [123, 45, 67]

Expected Output:

Sum of Digits: 28

Code In C#

using System; class SumOfDigitsInArray { static void Main() { // Calculate the sum of digits of all numbers in the array } }

Run Code?

Click Run Button to view compiled output

10. Create a program to calculate the product of all odd numbers in a hardcoded array.

Required Input:

Array: [1, 2, 3, 4, 5]

Expected Output:

Product of Odd Numbers: 15

Code In C#

using System; class ProductOfOddNumbers { static void Main() { // Calculate the product of all odd numbers in the array } }

Run Code?

Click Run Button to view compiled output

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