C# string guide

C# String Functions

C# string functions help clean, compare, split, join, format, and transform text in .NET applications.

Common C# String Methods

Frequently used C# string methods include ToUpper(), ToLower(), Trim(), Replace(), Split(), Contains(), StartsWith(), EndsWith(), and Substring().

C# String Examples

Change Case

var text = "Quick Developer Tools";
var upper = text.ToUpper();
var lower = text.ToLower();

Trim Whitespace

var raw = "  customer order  ";
var clean = raw.Trim();

Replace Text

var value = "order number";
var slug = value.Replace(" ", "-").ToLower();

Split and Join

var csv = "json,xml,string";
var parts = csv.Split(',');
var joined = string.Join(" | ", parts);

Check Text

var email = "[email protected]";
var hasAt = email.Contains("@");
var startsWithDemo = email.StartsWith("demo");

String Interpolation

var orderId = "ORD-2026-000873";
var message = $"Order {orderId} is ready.";

Try Text Transformations Online

Use QuickDeveloperTools String Utilities to test case conversion, slug generation, URL encoding, Base64 conversion, line cleanup, duplicate removal, sorting, and text counts before using similar logic in C#.

Open String Utilities