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C# questions
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Why Override GetHashCode When Overriding Equals in C#
Learn why GetHashCode must match Equals in C#, how hash-based collections work, and how to implement both methods correctly.
csharpoverridinghashcode
Why \d Can Be Slower Than [0-9] in C# Regex
Learn why \d may be slower than [0-9] in C# regex, how digit classes work, and when to use \d, [0-9], or explicit character sets.
csharpregexperformance
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