How Can I Validate Email Addresses in C#?

Validating Email Addresses with C#

Many applications need to verify email addresses for accuracy. C# offers several ways to achieve this.

A robust method uses the MailAddress class from System.Net.Mail. This class simplifies parsing and validation.

Here's a C# code example using MailAddress:

bool IsValidEmail(string email)
{
    string trimmedEmail = email.Trim();

    if (trimmedEmail.EndsWith("."))
    {
        return false; // Handles trailing periods
    }

    try
    {
        var addr = new System.Net.Mail.MailAddress(email);
        return addr.Address == trimmedEmail;
    }
    catch
    {
        return false;
    }
}

This code first removes extra whitespace. It then tries to create a MailAddress object. If successful, and the object's Address property matches the trimmed input, the email is valid. Otherwise, it's invalid.

Note: Email addresses can have varied formats, including those ending with a period (.). The code above addresses this potential issue.

The try-catch block handles potential exceptions, simplifying usage. However, carefully consider the implications of exception handling within your application's business logic.

While this built-in approach is effective, alternative methods include external libraries or custom regular expressions, depending on your specific needs.

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