C# TutorialLesson 13Free preview

C# Strings

This lesson is part of C# · All levels

Summary

Strings are immutable text storage objects, meaning their value cannot be changed in place. C# provides many built-in methods such as Length, ToUpper, Substring, IndexOf, and Split. Text writing can be done using a regular string, a verbatim string, or a string interpolation starting with a dollar sign.

Key points

String immutable: methods like ToUpper do not change the original string but return the new string.
Popular methods: Length, ToUpper, ToLower, Trim, Substring, IndexOf, Contains, and Split.
String interpolation makes it easy to mix text and variables into a single piece of code.
The verbatim string treats the backslash as a normal character so it fits the file path.
Combination can be done with the plus operator or String.Join for many pieces of text.

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