viewmodel ins wpf gepackt, build failed

DaSaSo.Wpf/ViewModel/ImpregnierungEditViewModel.cs

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+using DaSaSo.Domain.Model;
+using DaSaSo.Domain.Services;
+using DaSaSo.Wpf.ViewModel.Commands;
+using DaSaSo.Wpf.ViewModel.Interface;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace DaSaSo.Wpf.ViewModel
+{
+    public class ImpregnierungEditViewModel : BaseViewModel
+    {
+        private Impregnation _model;
+        public ICommand SaveImpregnation { get; set; }
+        public Impregnation Model { get =>  _model; set => _model = value; }
+
+        public int DN
+        {
+            get => _model.DN;
+            set
+            {
+                _model.DN = value;
+            }
+        }
+        public string LinerCharge
+        {
+            get => _model.LinerNumber;
+            set
+            {
+                _model.LinerNumber = value;
+            }
+        }
+        public decimal Wandstärke
+        {
+            get => _model.WallThickness;
+            set
+            {
+                _model.WallThickness = value;
+            }
+        }
+        public decimal LinerLänge
+        {
+            get => _model.Linerlength;
+            set
+            {
+                _model.Linerlength = value;
+            }
+        }
+        public string Imprägniernummer
+        {
+            get => _model.Number;
+            set
+            {
+                _model.Number = value;
+            }
+        }
+
+        public ImpregnierungEditViewModel(IActualProject actualProject, IDataService<Impregnation> dataservice)
+        {
+            _model = actualProject.AktuellImpregnation;
+            SaveImpregnation = new SaveImpregnationCommand(this,dataservice);
+        }
+    }
+}