C# Development for Beginners #8: Working with Strings in C# - Immutability and Performance
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Video Description
Strings are everywhere in C#, but they have surprising behavior! Learn why strings are immutable and when to use StringBuilder.
What you'll learn: • String immutability explained • Common string operations (searching, modifying, formatting) • String comparison the right way • The concatenation performance problem • StringBuilder to the rescue (250x faster!) • String interpolation with $"" • Escape sequences and verbatim strings with @ • Performance implications and memory usage
WARNING: String concatenation in loops can literally freeze your application!
Performance comparison: • 1000 concatenations: 15ms vs 0.1ms with StringBuilder • Memory: 500KB vs 4KB
Previous Video: Value vs Reference Types Deep Dive ► Full Playlist: https://www.youtube.com/playlist?list=PLGxFXI4dC2shfDgudNdh1FtSLcAZG0-Ba ► Code Repository: https://github.com/benday-inc/csharp-for-beginners-2025
Saved from a string performance disaster? Like the video! Subscribe for if/else decision making coming next. Had string performance issues? Share your story below!
#CSharp #Strings #StringBuilder #Performance #Immutability
0:00 Working with Strings in C# 0:01 www.benday.com 0:22 The String Paradox 0:39 String Basics 0:49 String Immutability 1:00 Common String Operations 1:36 String Comparison 1:46 The Concatenation Problem 1:57 StringBuilder to the Rescue 2:07 When to Use StringBuilder 2:26 String Interpolation Magic 2:37 StringReader and StringWriter 2:47 Escape Sequences and Verbatim Strings 2:58 Performance Numbers 3:22 Common String Mistakes 3:45 Key Takeaways 4:12 Next: Making Decisions with If/Else
Video Info
- Duration: 4:27
- Published: October 13, 2025
