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C#
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C#
C# LINQ GroupBy and Join: Keys, ToLookup, CountBy
LINQ GroupBy and Join beyond the basics: composite keys, ToLookup, null and duplicate keys, .NET 9 CountBy, measured on .NET 10.
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C#
C# LINQ Basics, Re-run on .NET 10
from, where, orderby, select, group and join with examples, all re-run on .NET 10. Deferred execution, the new LeftJoin method, and measured speed against a plain loop.
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C#
C# Lambda Expressions, Re-run on .NET 10
C# lambdas on .NET 10: natural types, C# 12 default parameters, static lambdas, the loop-capture trap, and measured capture cost.
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C#
C# Func and Action Delegates: Pitfalls and Call Cost
Func vs Action, why out parameters and Predicate<T> do not fit, three multicast traps, and measured call cost vs interfaces.
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