From 1440879257451629fd4687052cf9380c33a1f986 Mon Sep 17 00:00:00 2001
From: Zafer Balkan <zafer@zaferbalkan.com>
Date: Mon, 9 Feb 2026 16:59:51 +0200
Subject: [PATCH] Fixed typo in the ctor that would throw
 NullReferenceException for unbound field access instead of
 NotSupportedException

---
 TechnitiumLibrary.Security.OTP/Authenticator.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/TechnitiumLibrary.Security.OTP/Authenticator.cs b/TechnitiumLibrary.Security.OTP/Authenticator.cs
index a4bdf428..a1f2f3d6 100644
--- a/TechnitiumLibrary.Security.OTP/Authenticator.cs
+++ b/TechnitiumLibrary.Security.OTP/Authenticator.cs
@@ -43,7 +43,7 @@ public class Authenticator
         public Authenticator(AuthenticatorKeyUri keyUri)
         {
             if (!keyUri.Type.Equals("totp", StringComparison.OrdinalIgnoreCase))
-                throw new NotSupportedException($"The authenticator key URI type '{_keyUri.Type}' is not supported.");
+                throw new NotSupportedException($"The authenticator key URI type '{keyUri.Type}' is not supported.");
 
             _keyUri = keyUri;
             _key = Base32.FromBase32String(_keyUri.Secret);