Merge remote-tracking branch 'origin/mk/integrate-json-schema-library' into mk/integrate-json-schema-library

Author: MaggieKimani1

src/Microsoft.OpenApi.Readers/V31/JsonSchemaDeserializer.cs

@@ -22,8 +22,7 @@ public static JsonSchema LoadSchema(ParseNode node)
             var builder = new JsonSchemaBuilder();
 
             // check for a $ref and if present, add it to the builder as a Ref keyword
-            var pointer = mapNode.GetReferencePointer();
-            if (pointer != null)
+            if (mapNode.GetReferencePointer() is {} pointer)
             {
                 builder = builder.Ref(pointer);
 

src/Microsoft.OpenApi.Readers/V31/OpenApiCallbackDeserializer.cs

@@ -17,16 +17,15 @@ internal static partial class OpenApiV31Deserializer
         private static readonly PatternFieldMap<OpenApiCallback> _callbackPatternFields =
             new PatternFieldMap<OpenApiCallback>
             {
-            {s => !s.StartsWith("x-"), (o, p, n) => o.AddPathItem(RuntimeExpression.Build(p), LoadPathItem(n))},
-            {s => s.StartsWith("x-"), (o, p, n) => o.AddExtension(p, LoadExtension(p,n))},
+            {s => !s.StartsWith("x-", StringComparison.OrdinalIgnoreCase), (o, p, n) => o.AddPathItem(RuntimeExpression.Build(p), LoadPathItem(n))},
+            {s => s.StartsWith("x-", StringComparison.OrdinalIgnoreCase), (o, p, n) => o.AddExtension(p, LoadExtension(p,n))},
             };
 
         public static OpenApiCallback LoadCallback(ParseNode node)
         {
             var mapNode = node.CheckMapNode("callback");
 
-            var pointer = mapNode.GetReferencePointer();
-            if (pointer != null)
+            if (mapNode.GetReferencePointer() is {} pointer)
             {
                 return mapNode.GetReferencedObject<OpenApiCallback>(ReferenceType.Callback, pointer);
             }

src/Microsoft.OpenApi.Readers/V31/OpenApiComponentsDeserializer.cs

@@ -32,7 +32,7 @@ internal static partial class OpenApiV31Deserializer
         private static readonly PatternFieldMap<OpenApiComponents> _componentsPatternFields =
             new PatternFieldMap<OpenApiComponents>
             {
-            {s => s.StartsWith("x-"), (o, p, n) => o.AddExtension(p, LoadExtension(p, n))}
+            {s => s.StartsWith("x-", StringComparison.OrdinalIgnoreCase), (o, p, n) => o.AddExtension(p, LoadExtension(p, n))}
             };
 
         public static OpenApiComponents LoadComponents(ParseNode node)