Now try adding the property reference

src/OpenApi/src/Extensions/OpenApiServiceCollectionExtensions.cs

@@ -21,7 +21,7 @@ public static class OpenApiServiceCollectionExtensions
     /// <param name="services">The <see cref="IServiceCollection"/> to register services onto.</param>
     /// <param name="documentName">The name of the OpenAPI document associated with registered services.</param>
     /// <example>
-    /// This method is commonly used to add OpenAPI services to the Services
+    /// This method is commonly used to add OpenAPI services to the <see cref="WebApplicationBuilder.Services"/>
     /// of a <see cref="WebApplicationBuilder"/>, as shown in the following example:
     /// <code>
     /// var builder = WebApplication.CreateBuilder(args);
@@ -42,7 +42,7 @@ public static IServiceCollection AddOpenApi(this IServiceCollection services, st
     /// <param name="documentName">The name of the OpenAPI document associated with registered services.</param>
     /// <param name="configureOptions">A delegate used to configure the target <see cref="OpenApiOptions"/>.</param>
     /// <example>
-    /// This method is commonly used to add OpenAPI services to the Services
+    /// This method is commonly used to add OpenAPI services to the <see cref="WebApplicationBuilder.Services"/>
     /// of a <see cref="WebApplicationBuilder"/>, as shown in the following example:
     /// <code>
     /// var builder = WebApplication.CreateBuilder(args);
@@ -72,7 +72,7 @@ public static IServiceCollection AddOpenApi(this IServiceCollection services, st
     /// <param name="services">The <see cref="IServiceCollection"/> to register services onto.</param>
     /// <param name="configureOptions">A delegate used to configure the target <see cref="OpenApiOptions"/>.</param>
     /// <example>
-    /// This method is commonly used to add OpenAPI services to the Services
+    /// This method is commonly used to add OpenAPI services to the <see cref="WebApplicationBuilder.Services"/>
     /// of a <see cref="WebApplicationBuilder"/>, as shown in the following example:
     /// <code>
     /// var builder = WebApplication.CreateBuilder(args);
@@ -90,7 +90,7 @@ public static IServiceCollection AddOpenApi(this IServiceCollection services, Ac
     /// </summary>
     /// <param name="services">The <see cref="IServiceCollection"/> to register services onto.</param>
     /// <example>
-    /// This method is commonly used to add OpenAPI services to the Services
+    /// This method is commonly used to add OpenAPI services to the <see cref="WebApplicationBuilder.Services"/>
     /// of a <see cref="WebApplicationBuilder"/>, as shown in the following example:
     /// <code>
     /// var builder = WebApplication.CreateBuilder(args);