diff --git a/src/Forms/AddToOcrReplaceList.cs b/src/Forms/AddToOcrReplaceList.cs
index 0d4263495..807673b8d 100644
--- a/src/Forms/AddToOcrReplaceList.cs
+++ b/src/Forms/AddToOcrReplaceList.cs
@@ -43,10 +43,9 @@ namespace Nikse.SubtitleEdit.Forms
             {
                 return;
             }
-
             try
             {
-                var ci = new CultureInfo(languageString.Replace("_", "-"));
+                var ci = new CultureInfo(languageString.Replace('_', '-'));
                 _threeLetterIsoLanguageName = ci.ThreeLetterISOLanguageName;
             }
             catch (CultureNotFoundException exception)
diff --git a/src/Forms/AddToUserDic.cs b/src/Forms/AddToUserDic.cs
index da216c8b6..1ef1d042c 100644
--- a/src/Forms/AddToUserDic.cs
+++ b/src/Forms/AddToUserDic.cs
@@ -71,7 +71,7 @@ namespace Nikse.SubtitleEdit.Forms
         internal void Initialize(string hunspellName, string text)
         {
             if (!string.IsNullOrEmpty(text))
-                textBoxAddName.Text = text.Trim().TrimEnd('.').TrimEnd('!').TrimEnd('?');
+                textBoxAddName.Text = text.Trim().TrimEnd('.', '!', '?');
 
             comboBoxDictionaries.Items.Clear();
             foreach (string name in Utilities.GetDictionaryLanguages())
diff --git a/src/Forms/ChangeFrameRate.cs b/src/Forms/ChangeFrameRate.cs
index 0ce4967d5..ec9395336 100644
--- a/src/Forms/ChangeFrameRate.cs
+++ b/src/Forms/ChangeFrameRate.cs
@@ -11,15 +11,15 @@ namespace Nikse.SubtitleEdit.Forms
         {
             InitializeComponent();
 
-            comboBoxFrameRateFrom.Items.Add((23.976).ToString());
-            comboBoxFrameRateFrom.Items.Add((24.0).ToString());
-            comboBoxFrameRateFrom.Items.Add((25.0).ToString());
-            comboBoxFrameRateFrom.Items.Add((29.97).ToString());
+            comboBoxFrameRateFrom.Items.Add(23.976);
+            comboBoxFrameRateFrom.Items.Add(24.0);
+            comboBoxFrameRateFrom.Items.Add(25.0);
+            comboBoxFrameRateFrom.Items.Add(29.97);
 
-            comboBoxFrameRateTo.Items.Add((23.976).ToString());
-            comboBoxFrameRateTo.Items.Add((24.0).ToString());
-            comboBoxFrameRateTo.Items.Add((25.0).ToString());
-            comboBoxFrameRateTo.Items.Add((29.97).ToString());
+            comboBoxFrameRateTo.Items.Add(23.976);
+            comboBoxFrameRateTo.Items.Add(24.0);
+            comboBoxFrameRateTo.Items.Add(25.0);
+            comboBoxFrameRateTo.Items.Add(29.97);
 
             LanguageStructure.ChangeFrameRate language = Configuration.Settings.Language.ChangeFrameRate;
             Text = language.Title;