diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/IdGenerator.cs b/dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/IdGenerator.cs
index bd35fa8308..5741e8d161 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/IdGenerator.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/IdGenerator.cs
@@ -146,6 +146,9 @@ private static string GetRandomString(int stringLength, Random? random)
         const string Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
         if (random is not null)
         {
+#if NET10_0_OR_GREATER
+            return random.GetString(Chars, stringLength);
+#else
             // Use deterministic random generation when seed is provided
             return string.Create(stringLength, random, static (destination, random) =>
             {
@@ -154,6 +157,7 @@ private static string GetRandomString(int stringLength, Random? random)
                     destination[i] = Chars[random.Next(Chars.Length)];
                 }
             });
+#endif
         }
 
         // Use cryptographically secure random generation when no seed is provided