Programming and Software Interview Questions and Answers

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Sorting a Generic SortedList in Descending Order in C#

The SortedList class in C# provides a sorted collection of key-value pairs. By default, it sorts the elements in ascending order.

Demo & Full Guide

C# SortedList Sorting Descending Order Reverse Keys Values

Understanding the Difference Between Delegates and Events in C#

Delegates and events are two important concepts in C# programming that are often used interchangeably.

Demo & Full Guide

C# Delegates Events Programming Methods Functions

How to Read a File using StreamReader in C#?

This article provides a step-by-step guide on how to read a file using the StreamReader class in C#. It includes example code and emphasizes the importance of closing the StreamReader object to release system resources.

Demo & Full Guide

C# file handling StreamReader ReadLine Close method.

How to Calculate Code Execution Time in C#

This article provides a step-by-step guide on how to calculate code execution time in C# using the Stopwatch class. It includes an example code snippet and important points to keep in mind while using the Stopwatch class.

Demo & Full Guide

C# Stopwatch class code optimization performance measurement elapsed time system timer.

Understanding Design Principle vs Design Pattern in C#

This article explains the difference between design principles and design patterns in software development, and how to implement them using C# code examples.

Demo & Full Guide

C# software development design principles design patterns SOLID principles Singleton pattern.

Converting a String to an Integer in C#: Methods and Examples

This article explains how to convert a string to an integer in C# using int.Parse() and int.TryParse() methods with examples. It also highlights the importance of validating the string being parsed to avoid errors.

Demo & Full Guide

C# .NET Programming Parsing Data Validation

Using the "out" Keyword in C# for Efficient and Readable Code

This article explains what the "out" keyword is in C# programming language and how it can be used to pass parameters by reference. It also provides examples of using the "out" keyword and when it should be used.

Demo & Full Guide

C# Programming Out Keyword Pass Parameters by Reference Efficient Code Readable Code

Understanding Boxing and Unboxing in C# Programming

This article explains the fundamental concepts of boxing and unboxing in C# programming language. It covers the definition, examples, when to use, and the performance impact of these concepts.

Demo & Full Guide

C# Programming Value Types Reference Types Performance Optimization.

Understanding the ref Keyword in C#

This article explains the ref keyword in C#, including how it works and how to use it to pass arguments by reference and define reference parameters.

Demo & Full Guide

C# ref keyword pass by reference reference parameters pointers in C#

How to Sort an Array in C#: A Complete Guide

This article is a comprehensive guide on how to sort an array in C#. It covers the most commonly used methods for sorting an array in ascending or descending order. Additionally, it explains how to sort an array of objects and using LINQ for sorting.

Demo & Full Guide

C# sorting Array.Sort Array.Reverse IComparable LINQ.

|<<123 4 5 6 7 8 9 10 ...>>|

Sorting a Generic SortedList in Descending Order in C#

Understanding the Difference Between Delegates and Events in C#

How to Read a File using StreamReader in C#?

How to Calculate Code Execution Time in C#

Understanding Design Principle vs Design Pattern in C#

Converting a String to an Integer in C#: Methods and Examples

Using the "out" Keyword in C# for Efficient and Readable Code

Understanding Boxing and Unboxing in C# Programming

Understanding the ref Keyword in C#

How to Sort an Array in C#: A Complete Guide

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