添加项目文件。

GroupLine.App/View/MsgInput.xaml.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Windows;
+
+namespace GroupLine.App.View
+{
+    /// <summary>
+    /// MsgInput.xaml 的交互逻辑
+    /// </summary>
+    public partial class MsgInput : Window
+    {
+        public MsgInput()
+        {
+            InitializeComponent();
+        }
+
+        public string InputValue
+        {
+            get
+            {
+                return Box.Text;
+            }
+            set
+            {
+                this.Box.Text = value;
+            }
+        }
+
+        public event EventHandler Accept;
+
+        private void ButtonCmd_Click(object sender, RoutedEventArgs e)
+        {
+            if (Accept != null)
+            {
+                Accept(this, EventArgs.Empty);
+                this.Close();
+            }
+        }
+
+    }
+}