Update UnbrandedGeneratorVersion to 1.0.0-alpha.20250718.1 (Azure#51362)

* Update UnbrandedGeneratorVersion to 1.0.0-alpha.20250718.1

* regen

---------

Co-authored-by: Ubuntu <cloudtest@63e21d36c000015.tkkhlgj2u51eln3mcb0lygmbye.dx.internal.cloudapp.net>
Co-authored-by: jolov <[email protected]>

Author: 3 people

eng/Packages.Data.props

@@ -454,7 +454,7 @@
 
   <PropertyGroup>
     <TestProxyVersion>1.0.0-dev.20250501.1</TestProxyVersion>
-    <UnbrandedGeneratorVersion>1.0.0-alpha.20250715.1</UnbrandedGeneratorVersion>
+    <UnbrandedGeneratorVersion>1.0.0-alpha.20250718.1</UnbrandedGeneratorVersion>
     <AzureGeneratorVersion>1.0.0-alpha.20250715.3</AzureGeneratorVersion>
   </PropertyGroup>
 </Project>

eng/http-client-csharp-emitter-package-lock.json

@@ -2,7 +2,7 @@
   "main": "dist/src/index.js",
   "dependencies": {
     "client-plugin": "file:../../../../eng/packages/plugins/client",
-    "@typespec/http-client-csharp": "1.0.0-alpha.20250715.1"
+    "@typespec/http-client-csharp": "1.0.0-alpha.20250718.1"
   },
   "devDependencies": {
     "@azure-tools/typespec-azure-core": "0.57.0",

eng/http-client-csharp-emitter-package.json

@@ -55,7 +55,7 @@ public ConverterTypeProvider(TypeProvider serializationProvider)
 
             protected override string BuildNamespace() => $"{_serializationProvider.Type.Namespace}.{_serializationProvider.Name}";
 
-            protected override CSharpType GetBaseType() => new CSharpType(typeof(JsonConverter<>), _serializationProvider.Type);
+            protected override CSharpType BuildBaseType() => new CSharpType(typeof(JsonConverter<>), _serializationProvider.Type);
 
             protected override TypeSignatureModifiers BuildDeclarationModifiers() => TypeSignatureModifiers.Internal | TypeSignatureModifiers.Partial;