diff --git a/anbs_cp/Extensions/GuidExtensions.cs b/anbs_cp/Extensions/GuidExtensions.cs
index a2abf35..a7ad383 100644
--- a/anbs_cp/Extensions/GuidExtensions.cs
+++ b/anbs_cp/Extensions/GuidExtensions.cs
@@ -12,7 +12,7 @@ public static class GuidExtensions
     /// </summary>
     /// <param name="g">Guid или null</param>
     /// <returns>Guid пуст (null) или равен Guid.Empty</returns>
-    public static bool IsNullOrEmpty ([NotNullWhen(true)] this Guid? g) => g == null || g == Guid.Empty;
+    public static bool IsNullOrEmpty ([NotNullWhen(false)] this Guid? g) => g == null || g == Guid.Empty;
 
     /// <summary>
     /// Проверяет Guid на пустоту
diff --git a/anbs_cp/Extensions/StringExtensions.cs b/anbs_cp/Extensions/StringExtensions.cs
index 13a7016..10fa67c 100644
--- a/anbs_cp/Extensions/StringExtensions.cs
+++ b/anbs_cp/Extensions/StringExtensions.cs
@@ -12,5 +12,5 @@ public static class StringExtensions
     /// </summary>
     /// <param name="s">Строка</param>
     /// <returns>Строка пуста (null) или содержит только пробелы</returns>
-    public static bool IsNullOrWhiteSpace ([NotNullWhen(true)] this string? s) => s == null || s.Trim().Length == 0;
+    public static bool IsNullOrWhiteSpace ([NotNullWhen(false)] this string? s) => s == null || s.Trim().Length == 0;
 }
\ No newline at end of file