From 2fe7146842ab21327376c1f515cecd13a6358bf9 Mon Sep 17 00:00:00 2001
From: Sebastian <sebastian@squidex.io>
Date: Wed, 24 Mar 2021 12:49:22 +0100
Subject: [PATCH] Build fix.

---
 .../Contents/DomainObject/OperationContext.cs                 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/backend/src/Squidex.Domain.Apps.Entities/Contents/DomainObject/OperationContext.cs b/backend/src/Squidex.Domain.Apps.Entities/Contents/DomainObject/OperationContext.cs
index 2bafe0447..5c1b16192 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Contents/DomainObject/OperationContext.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Contents/DomainObject/OperationContext.cs
@@ -9,7 +9,7 @@ using System;
 using System.Collections.Generic;
 using System.Security.Claims;
 using System.Threading.Tasks;
-using GraphQL.Utilities;
+using Microsoft.Extensions.DependencyInjection;
 using Squidex.Domain.Apps.Core.Schemas;
 using Squidex.Domain.Apps.Entities.Apps;
 using Squidex.Domain.Apps.Entities.Contents.Commands;
@@ -80,7 +80,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.DomainObject
             };
         }
 
-        public T Resolve<T>()
+        public T Resolve<T>() where T : notnull
         {
             return serviceProvider.GetRequiredService<T>();
         }