Writing
Builder Pattern and C# Expressions
Test-data builders keep each scenario's chosen values visible. C# expression trees select model properties, and stored overrides preserve explicit nulls.
Topic
Immutability
Keeping a value or object's contents unchanged after creation. Operations produce replacement values, while variables may still be reassigned to refer to those replacements.
4 pages
Writing
So You Think You Know C#? Static Classes
Choose static classes when instances serve no purpose. Shared type state, autonomous methods and immutable inputs explain the discipline that makes them useful.
Writing
So You Think You Know C#? The Fundamentals
C# passes arguments by value by default. Integer, string and object examples explain what gets copied, how ref works and which changes reach the caller.
Writing
.NET Memory Allocations and Performance
.NET allocation costs follow what gets stored and copied. Structs, classes, arrays and strings explain object layout, references and garbage collection.