From 40c89073fc6dbbf4ecf930bfb263530c19d87d52 Mon Sep 17 00:00:00 2001
From: JoshLove-msft <54595583+JoshLove-msft@users.noreply.github.com>
Date: Thu, 31 Oct 2024 10:05:37 -0700
Subject: [PATCH] Fix check for determining if abstract serialization method is
 needed (#4930)

---
 .../src/Providers/MrwSerializationTypeDefinition.cs             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/MrwSerializationTypeDefinition.cs b/packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/MrwSerializationTypeDefinition.cs
index e83dce1075..08b9cdc74c 100644
--- a/packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/MrwSerializationTypeDefinition.cs
+++ b/packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/MrwSerializationTypeDefinition.cs
@@ -434,7 +434,7 @@ internal MethodProvider BuildDeserializationMethod()
             return new MethodProvider
             (
               new MethodSignature(methodName, null, signatureModifiers, _model.Type, null, [_jsonElementDeserializationParam, _serializationOptionsParameter]),
-              _model.DeclarationModifiers.HasFlag(TypeSignatureModifiers.Abstract) && _inputModel.DiscriminatorProperty != null ? BuildAbstractDeserializationMethodBody() : BuildDeserializationMethodBody(),
+              _model.DeclarationModifiers.HasFlag(TypeSignatureModifiers.Abstract) && _inputModel.DiscriminatedSubtypes.Count > 0 ? BuildAbstractDeserializationMethodBody() : BuildDeserializationMethodBody(),
               this
             );
         }