public static IApplicationBuilder UseGraphQL( this IApplicationBuilder applicationBuilder, QueryMiddlewareOptions options) { if (applicationBuilder == null) { throw new ArgumentNullException(nameof(applicationBuilder)); } if (options == null) { throw new ArgumentNullException(nameof(options)); } return(applicationBuilder .UseMiddleware <PostQueryMiddleware>(options) .UseMiddleware <GetQueryMiddleware>(options) .UseMiddleware <SubscriptionMiddleware>(options)); }