how to organize generated regex partials and use them elsewhere

Program.cs

using System.Text.RegularExpressions;

namespace GeneratedRegexTest;

public static partial class RegexUtilities
{
    // define a partial, parameterless method with GeneratedRegex attribute
    // pattern to match SSN format (e.g. 123-45-6789)
    [GeneratedRegex(@"\b\d{3}-\d{2}-\d{4}\b")]
    public static partial Regex SsnRegex();
}

public class Program
{
    public static void Main()
    {
        string text = "Sample SSNs: 123-45-6789, 987-65-4321, and some other text.";

        // use the generated regex method to get a regex instance
        Regex ssnRegex = RegexUtilities.SsnRegex();

        // find all matches in the text
        foreach (Match match in ssnRegex.Matches(text))
        {
            Console.WriteLine($"Found SSN: {match.Value}");
        }
    }
}