Strings

Relax. We'll talk through this in plain words — no textbook voice.

A string is the type that handles text data. It's commonly used to store things like usernames, emails, messages, product titles, and search keywords. C# strings come with plenty of useful methods, which makes text processing easy.

csharp

string userName = "  thuta tech  ";
string cleanName = userName.Trim();

Console.WriteLine(cleanName.ToUpper());
Console.WriteLine($"Length: {cleanName.Length}");
Console.WriteLine($"Contains tech: {cleanName.Contains("tech")}");

What this code does

Trim() strips spaces from the start and end of the text.
ToUpper() converts all letters to uppercase.
Length returns the number of characters.
Contains() checks whether a given piece of text is present.

You should see

THUTA TECH Length: 10 Contains tech: True

Info

⚠️ Common mistake

Uppercase and lowercase can matter a lot in C# string comparisons. "Tech" and "tech" aren't treated as equal. If your search logic needs to be case-insensitive, convert both sides with ToLower() before comparing.