Add project files.

TestRunner/MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using TestingLib;
+
+namespace TestRunner
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        private ObservableCollection<TestingLib.UnitTestInfo> _results = new ObservableCollection<UnitTestInfo>();
+        public MainWindow()
+        {
+            InitializeComponent();
+            this.DataContext = _results;
+        }
+
+        private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
+        {
+            var testClass = new TestingLib.TestThePaymentDate();
+            _results.Add( testClass.DateIs30DaysInFuture());
+            _results.Add(testClass.ReturnsMondayIfProposedIsSaturday());
+            _results.Add(testClass.ReturnsMondayIfProposedIsSunday());
+
+        }
+    }
+}