From 254a61e2dde3fbf9f40fddf55ba72412c8bac13d Mon Sep 17 00:00:00 2001
From: 3Matvey <andrianov8m@gmail.com>
Date: Wed, 6 May 2026 23:35:20 +0300
Subject: [PATCH] Improve nullable annotations for Result error

---
 src/Common/ResultPattern/Result.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Common/ResultPattern/Result.cs b/src/Common/ResultPattern/Result.cs
index 13e1ed7..dee665e 100644
--- a/src/Common/ResultPattern/Result.cs
+++ b/src/Common/ResultPattern/Result.cs
@@ -1,4 +1,5 @@
-using System.Text.Json.Serialization;
+using System.Diagnostics.CodeAnalysis;
+using System.Text.Json.Serialization;
 
 namespace Common.ResultPattern;
 
@@ -22,6 +23,7 @@ protected Result()
     /// <param name="error">The error associated with the failed result.</param>
     protected Result(Error error)
     {
+        ArgumentNullException.ThrowIfNull(error);
         IsSuccess = false;
         Error = error;
     }
@@ -29,6 +31,7 @@ protected Result(Error error)
     /// <summary>
     /// Gets a value indicating whether the result is successful.
     /// </summary>
+    [MemberNotNullWhen(false, nameof(Error))]
     public bool IsSuccess { get; }
 
     /// <summary>