The CodeWithShreya blog

Clear explanations

.NET

6 min read

Compile-Time Error vs Runtime Error in C#: Explained with Examples

Learn the difference between compile-time and runtime errors in C# with clear examples, including type errors, divide-by-zero exceptions, null references, and var vs dynamic.

.NET

4 min read

`var` vs `dynamic` in C#: What’s the Difference?

Understand the difference between var and dynamic in C#, including compile-time type inference, runtime binding, type safety, and when to use each.

.NET

12 min read

C# Data Types Explained in Depth: Value Types vs Reference Types

A complete guide to C# data types, including value types, reference types, integers, float, double, decimal, string, arrays, classes, interfaces, delegates, var, dynamic, boxing, and nullable types.

.NET

8 min read

C# Conditions, Loops, and Methods Explained with Simple Examples

Learn how conditions, loops, and methods work in C# with simple beginner-friendly examples, including if/else, for, foreach, while, and reusable methods.

.NET

8 min read

Variables and Data Types in C#: Value Types, Reference Types, and var Explained

Learn how variables and data types work in C#, including var, value types, reference types, arrays, strings, and the difference between copying values and references.

.NET

8 min read

C# Input Handling Made Easy: Console.ReadLine(), Split(), and Parse() Explained

A beginner-friendly guide to reading, splitting, and parsing input in C# for DSA and competitive programming.

Data Structures

13 min read

Time and space complexity explained with one practical example

Understand Big O, time complexity, and space complexity by comparing three duplicate-checking solutions.

Operating Systems

9 min read

Processes, threads, and concurrency explained

Understand how modern operating systems schedule and execute your programs.

Coming soon

DBMS

10 min read

Why one SQL join returns 5 rows and another returns 12

Learn inner, left, right, and full joins through one clear, practical dataset.

Computer Networks

12 min read

What really happens when you enter a URL?

Follow a request through DNS, CDN, load balancers, app servers, and downstream services.

Computer Networks

11 min read

IP addressing explained: classful, subnetting, and CIDR

Understand how IPv4 addressing evolved from fixed classes to subnetting and CIDR with masks, host counts, and examples.

.NET

12 min read

API works locally but returns 502 after deployment: how to debug it

Learn a practical layer-by-layer process for debugging deployed APIs that fail with 502 Bad Gateway.

Algorithms

10 min read

Master binary search patterns

Move beyond simple search and recognize the patterns behind boundary problems.

Coming soon

.NET

11 min read

Make your .NET app speak every user's language

Understand cultures, resource files, translated UI, and culture-aware formatting in .NET apps.

.NET

18 min read

C# basics every .NET beginner should know

Prepare for .NET interviews with clear examples of C# value types, boxing, equality, inheritance, strings, records, and more.

Programming

11 min read

How to become a .NET developer: what you need to learn

Follow a practical .NET developer roadmap covering C#, ASP.NET Core, SQL, EF Core, authentication, testing, Git, and deployment.

Career

7 min read

How to build a focused CS study roadmap

Turn a long list of subjects into a realistic plan you can actually complete.

Coming soon