C# 8.0 のnull許容参照型を有効化

[opentween/open-tween.git] / OpenTween / InputDialog.cs

diff --git a/OpenTween/InputDialog.cs b/OpenTween/InputDialog.cs
index 4e5839f..869fb30 100644 (file)
--- a/OpenTween/InputDialog.cs
+++ b/OpenTween/InputDialog.cs
@@ -19,6 +19,8 @@
 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
 // Boston, MA 02110-1301, USA.
 
+#nullable enable
+
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
@@ -44,13 +46,13 @@ namespace OpenTween
         public static DialogResult Show(string text, out string inputText)
             => Show(null, text, "", out inputText);
 
-        public static DialogResult Show(IWin32Window owner, string text, out string inputText)
+        public static DialogResult Show(IWin32Window? owner, string text, out string inputText)
             => Show(owner, text, "", out inputText);
 
         public static DialogResult Show(string text, string caption, out string inputText)
             => Show(null, text, caption, out inputText);
 
-        public static DialogResult Show(IWin32Window owner, string text, string caption, out string inputText)
+        public static DialogResult Show(IWin32Window? owner, string text, string caption, out string inputText)
         {
             using var dialog = new InputDialog();
             dialog.labelMain.Text = text;