A short format GUID/UUID based on Mads Kristensens work

GuidExtensions.cs

public static class GuidExtensions {

    /// <summary>
    /// Converts a Guid into a short format useful urls
    /// </summary>
    /// <remarks>
    /// See <see>https://madskristensen.net/blog/A-shorter-and-URL-friendly-GUID</see> for a more detailed explantion.
    /// </remarks>
    public static string ToShortFormat(this Guid guid) =>
        Convert.ToBase64String(guid.ToByteArray())
            .Replace("/", "_")
            .Replace("+", "-")
            .Substring(0, 22);
}