Use JsonNullSentinel.JsonNull

Youssef1313 · Youssef1313 · commit 75141cd2b3b4 · 2026-07-03T16:16:52.000+02:00
diff --git a/src/Microsoft.OpenApi/Models/OpenApiSchema.cs b/src/Microsoft.OpenApi/Models/OpenApiSchema.cs
@@ -554,7 +554,7 @@ private void SerializeInternal(IOpenApiWriter writer, OpenApiSpecVersion version
                     var clonedToMutateEnum = element.CreateShallowCopy();
                     if (clonedToMutateEnum is OpenApiSchema { Enum: { } existingEnum } concreteCloned)
                     {
-                        concreteCloned.Enum = [.. existingEnum, null!];
+                        concreteCloned.Enum = [.. existingEnum, JsonNullSentinel.JsonNull];
                         callback(writer, clonedToMutateEnum);
                     }
                     else

Original file line number	Diff line number	Diff line change
`@@ -554,7 +554,7 @@ private void SerializeInternal(IOpenApiWriter writer, OpenApiSpecVersion version`
`554`	`554`	`var clonedToMutateEnum = element.CreateShallowCopy();`
`555`	`555`	`if (clonedToMutateEnum is OpenApiSchema { Enum: { } existingEnum } concreteCloned)`
`556`	`556`	`{`
`557`		`- concreteCloned.Enum = [.. existingEnum, null!];`
	`557`	`+ concreteCloned.Enum = [.. existingEnum, JsonNullSentinel.JsonNull];`
`558`	`558`	`callback(writer, clonedToMutateEnum);`
`559`	`559`	`}`
`560`	`560`	`else`