diff --git a/anbs_cp/Extensions/GuidExtensions.cs b/anbs_cp/Extensions/GuidExtensions.cs
index 0670873..a2abf35 100644
--- a/anbs_cp/Extensions/GuidExtensions.cs
+++ b/anbs_cp/Extensions/GuidExtensions.cs
@@ -1,4 +1,6 @@
-namespace anbs_cp.Extensions;
+using System.Diagnostics.CodeAnalysis;
+
+namespace anbs_cp.Extensions;
 
 /// <summary>
 /// Расширение Guid
@@ -10,7 +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 (this Guid? g) => g == null || g == Guid.Empty;
+    public static bool IsNullOrEmpty ([NotNullWhen(true)] 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 14c3bd0..13a7016 100644
--- a/anbs_cp/Extensions/StringExtensions.cs
+++ b/anbs_cp/Extensions/StringExtensions.cs
@@ -1,4 +1,6 @@
-namespace anbs_cp.Extensions;
+using System.Diagnostics.CodeAnalysis;
+
+namespace anbs_cp.Extensions;
 
 /// <summary>
 /// Расширение строк
@@ -10,5 +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 (this string? s) => s == null || s.Trim().Length == 0;
+    public static bool IsNullOrWhiteSpace ([NotNullWhen(true)] this string? s) => s == null || s.Trim().Length == 0;
 }
\ No newline at end of file
diff --git a/anbs_cp/anbs_cp.csproj b/anbs_cp/anbs_cp.csproj
index b10818e..aaf438b 100644
--- a/anbs_cp/anbs_cp.csproj
+++ b/anbs_cp/anbs_cp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
-    <Version>2024.2.23</Version>
+    <Version>2024.3.01</Version>
     <Authors>Александр Бабаев</Authors>
     <Product>Набор компонентов ANB Software</Product>
     <Description>Библиотека полезных методов языка C#</Description>