csharp / intermediate
Snippet
Implementing Defensive Logic with Guard Clauses
Guard clauses are a pattern that checks for invalid conditions at the start of a function. This ensures security by validating inputs and makes the main logic easier to test and maintain.
snippet.cs
csharp
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public void ProcessData(string input){ArgumentNullException.ThrowIfNull(input);if (input.Length < 5) throw new ArgumentException("Input too short");// Proceed with logic}
Breakdown
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ArgumentNullException.ThrowIfNull(input)
A modern, concise way to prevent null-reference issues early in execution.
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throw new ArgumentException("Input too short")
Enforces business rules before any state changes occur.