@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Linq;
 
 namespace EntityGraphQL;
 
@@ -98,4 +99,35 @@ public GraphQLError(string message, string[]? path, IDictionary<string, object>?
         if (extensions != null)
             this[QueryResult.ExtensionsKey] = new Dictionary<string, object>(extensions);
     }
+
+    public override bool Equals(object? obj)
+    {
+        if (obj is not GraphQLError other)
+            return false;
+
+        bool extensionsEqual =
+            (Extensions == null && other.Extensions == null)
+            || (Extensions != null && other.Extensions != null && Extensions.Count == other.Extensions.Count && !Extensions.Except(other.Extensions).Any());
+
+        return Message == other.Message && ((Path == null && other.Path == null) || (Path != null && other.Path != null && Path.SequenceEqual(other.Path))) && extensionsEqual;
+    }
+
+    public override int GetHashCode()
+    {
+        int hash = Message?.GetHashCode() ?? 0;
+        if (Path != null)
+        {
+            foreach (var p in Path)
+                hash = hash * 31 + (p?.GetHashCode() ?? 0);
+        }
+        if (Extensions != null)
+        {
+            foreach (var kv in Extensions.OrderBy(kv => kv.Key))
+            {
+                hash = hash * 31 + kv.Key.GetHashCode();
+                hash = hash * 31 + (kv.Value?.GetHashCode() ?? 0);
+            }
+        }
+        return hash;
+    }
 }