Archetektur angefangen

KundenManagment/KundeManager.cs

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+using KanSan.CrossCutting.DataClasses;
+using KanSan.DataStoring.Contract;
+using KundenManagement.Contract;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace KundenManagment
+{
+    public class KundeManager : IKundeManager
+    {
+        
+        private readonly IRepository<Kunde> _repository;
+        public KundeManager(IRepository<Kunde> repository)
+        {
+            
+            _repository = repository;
+        }
+        public List<Kunde> GetAllKunden()
+        {
+            return _repository
+                .Query
+                .Where(p => p.ID >= 0)
+                .ToList();
+        }
+    }
+}

KundenManagment/KundenManagement.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DataStoring.Contract\DataStoring.Contract.csproj" />
+    <ProjectReference Include="..\KundenManagement.Contract\KundenManagement.Contract.csproj" />
+  </ItemGroup>
+
+</Project>