Snippet

Enforcing Input Requirements

Validation logic at the start of a method (Guard Clauses) prevents invalid data from causing errors or security vulnerabilities deeper in your code.

snippet.cs

csharp

using System;
 
public class AccountManager {
    public void RegisterEmail(string email) {
        // Guard clause to ensure data security and integrity
        if (string.IsNullOrEmpty(email) || !email.Contains("@")) {
            throw new ArgumentException("Valid email is required.");
        }
        Console.WriteLine("Registered: " + email);
    }
}

Breakdown

if (string.IsNullOrEmpty(email) || !email.Contains("@"))

Checks if the input is empty or lacks a mandatory character.

throw new ArgumentException("...");

Immediately stops execution and notifies the caller about the invalid input.

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Enforcing Input Requirements

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