Gui neu angelegt

StammGenerator/Services/OpenFileDialogService.cs

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+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StammGenerator.Services
+{
+    internal class OpenFileDialogService
+    {
+        public string OpenFileDialog()
+        {
+            OpenFileDialog dialog = new OpenFileDialog();
+            dialog.Filter = "CSV Files(.csv)|*.csv";
+            dialog.FilterIndex = 1;
+            dialog.Multiselect = false;
+            if(dialog.ShowDialog() == true)
+            {
+                return dialog.FileName;
+            }
+            return string.Empty;
+            
+        }
+    }
+}