Verifying Username Constraints

Snippet

Verifying Username Constraints

Security begins with validating user input. By checking for null values or insufficient lengths before processing data, you prevent common errors and potential exploits in your application logic.

snippet.cs

csharp

using System;
 
public class AccountService {
    public void CreateUser(string name) {
        // Basic security check: ensure input is valid
        if (string.IsNullOrWhiteSpace(name) || name.Length < 4) {
            throw new ArgumentException("Username is too short or empty.");
        }
        Console.WriteLine($"User {name} created successfully.");
    }
}

Breakdown

string.IsNullOrWhiteSpace(name)

Checks if the string is null, empty, or consists only of spaces.

throw new ArgumentException(...)

Signals that a provided argument to the method is invalid.

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Verifying Username Constraints

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