Interktion im WPF erweitert

DaSaSo.Domain/Services/BuildingsiteServices/BuildingsiteService.cs

@@ -0,0 +1,30 @@
+using DaSaSo.Domain.Model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DaSaSo.Domain.Services.BuildingsiteServices
+{
+    public class BuildingsiteService : IBuildingsiteService
+    {
+        private readonly IDataService<Project> _projectService;
+
+        public BuildingsiteService(IDataService<Project> projectService)
+        {
+            _projectService = projectService;
+        }
+
+        public async Task<Buildingsite> CreateBuildingsite(Project proj)
+        {
+            Buildingsite buildingsite = new Buildingsite()
+            {
+                Project = proj
+            };
+            proj.BuildingSites.Add(buildingsite);
+            await _projectService.Update(proj.Id, proj);
+            return buildingsite;
+        }
+    }
+}