Improve case insensitive EndsWith

src/Forms/AddWaveForm.cs

@@ -242,7 +242,7 @@ namespace Nikse.SubtitleEdit.Forms
             int numberOfAudioTracks = 0;
             if (labelVideoFileName.Text.Length > 1 && File.Exists(labelVideoFileName.Text))
             {
-                if (labelVideoFileName.Text.ToLower().EndsWith(".mkv"))
+                if (labelVideoFileName.Text.EndsWith(".mkv", StringComparison.OrdinalIgnoreCase))
                 { // Choose for number of audio tracks in matroska files
                     try
                     {
@@ -269,7 +269,7 @@ namespace Nikse.SubtitleEdit.Forms
                     {
                     }
                 }
-                else if (labelVideoFileName.Text.ToLower().EndsWith(".mp4") || labelVideoFileName.Text.ToLower().EndsWith(".m4v"))
+                else if (labelVideoFileName.Text.EndsWith(".mp4", StringComparison.OrdinalIgnoreCase) || labelVideoFileName.Text.EndsWith(".m4v", StringComparison.OrdinalIgnoreCase))
                 { // Choose for number of audio tracks in mp4 files
                     try
                     {
@@ -316,7 +316,7 @@ namespace Nikse.SubtitleEdit.Forms
                 }
 
                 // check for delay in matroska files
-                if (labelVideoFileName.Text.ToLower().EndsWith(".mkv"))
+                if (labelVideoFileName.Text.EndsWith(".mkv", StringComparison.OrdinalIgnoreCase))
                 {
                     try
                     {

src/Forms/BatchConvert.cs

@@ -680,16 +680,16 @@ namespace Nikse.SubtitleEdit.Forms
                     var bluRaySubtitles = new List<BluRaySupParser.PcsData>();
                     bool isVobSub = false;
                     bool isMatroska = false;
-                    if (format == null && fileName.ToLower().EndsWith(".sup") && Main.IsBluRaySupFile(fileName))
+                    if (format == null && fileName.EndsWith(".sup", StringComparison.OrdinalIgnoreCase) && Main.IsBluRaySupFile(fileName))
                     {
                         var log = new StringBuilder();
                         bluRaySubtitles = BluRaySupParser.ParseBluRaySup(fileName, log);
                     }
-                    else if (format == null && fileName.ToLower().EndsWith(".sub") && Main.HasVobSubHeader(fileName))
+                    else if (format == null && fileName.EndsWith(".sub", StringComparison.OrdinalIgnoreCase) && Main.HasVobSubHeader(fileName))
                     {
                         isVobSub = true;
                     }
-                    else if (format == null && fileName.ToLower().EndsWith(".mkv") && item.SubItems[2].Text.StartsWith("Matroska"))
+                    else if (format == null && fileName.EndsWith(".mkv", StringComparison.OrdinalIgnoreCase) && item.SubItems[2].Text.StartsWith("Matroska"))
                     {
                         isMatroska = true;
                     }

src/Forms/ExportPngXml.cs

@@ -687,7 +687,7 @@ $DROP=[DROPVALUE]" + Environment.NewLine + Environment.NewLine +
                                 sb +
                                 "</DCSubtitle>");
                     string fName = saveFileDialog1.FileName;
-                    if (!fName.ToLower().EndsWith(".xml"))
+                    if (!fName.EndsWith(".xml", StringComparison.OrdinalIgnoreCase))
                         fName += ".xml";
                     File.WriteAllText(fName, SubtitleFormat.ToUtf8XmlString(doc));
                     MessageBox.Show(string.Format(Configuration.Settings.Language.ExportPngXml.XImagesSavedInY, imagesSavedCount, Path.GetDirectoryName(fName)));

src/Forms/GetDictionaries.cs

@@ -188,7 +188,7 @@ namespace Nikse.SubtitleEdit.Forms
             {
                 foreach (ZipExtractor.ZipFileEntry entry in dir)
                 {
-                    if (entry.FilenameInZip.ToLower().EndsWith(".zip", StringComparison.Ordinal))
+                    if (entry.FilenameInZip.EndsWith(".zip", StringComparison.OrdinalIgnoreCase))
                     {
                         var innerMs = new MemoryStream();
                         zip.ExtractFile(entry, innerMs);
@@ -213,7 +213,7 @@ namespace Nikse.SubtitleEdit.Forms
         {
             foreach (ZipExtractor.ZipFileEntry entry in dir)
             {
-                if (entry.FilenameInZip.ToLower().EndsWith(".dic") || entry.FilenameInZip.ToLower().EndsWith(".aff"))
+                if (entry.FilenameInZip.EndsWith(".dic", StringComparison.OrdinalIgnoreCase) || entry.FilenameInZip.EndsWith(".aff", StringComparison.OrdinalIgnoreCase))
                 {
                     string fileName = Path.GetFileName(entry.FilenameInZip);
 

src/Forms/ImportUnknownFormat.cs

@@ -70,7 +70,7 @@ namespace Nikse.SubtitleEdit.Forms
                 textBoxText.Text = File.ReadAllText(fileName, encoding);
 
                 // check for RTF file
-                if (fileName.ToLower().EndsWith(".rtf") && !textBoxText.Text.Trim().StartsWith("{\\rtf"))
+                if (fileName.EndsWith(".rtf", StringComparison.OrdinalIgnoreCase) && !textBoxText.Text.Trim().StartsWith("{\\rtf"))
                 {
                     var rtBox = new RichTextBox();
                     rtBox.Rtf = textBoxText.Text;

src/Forms/Main.cs

@@ -2616,7 +2616,7 @@ namespace Nikse.SubtitleEdit.Forms
                     }
                 }
 
-                if (fileName.ToLower().EndsWith(".dost", StringComparison.Ordinal))
+                if (fileName.EndsWith(".dost", StringComparison.OrdinalIgnoreCase))
                 {
                     try
                     {
@@ -2823,7 +2823,7 @@ namespace Nikse.SubtitleEdit.Forms
                         string s = File.ReadAllText(fileName, enc);
 
                         // check for RTF file
-                        if (fileName.ToLower().EndsWith(".rtf", StringComparison.Ordinal) && !s.Trim().StartsWith("{\\rtf", StringComparison.Ordinal))
+                        if (fileName.EndsWith(".rtf", StringComparison.OrdinalIgnoreCase) && !s.Trim().StartsWith("{\\rtf", StringComparison.Ordinal))
                         {
                             var rtBox = new RichTextBox();
                             rtBox.Rtf = s;
@@ -3023,7 +3023,7 @@ namespace Nikse.SubtitleEdit.Forms
                     }
                     else
                     {
-                        if (!string.IsNullOrEmpty(fileName) && fileName.ToLower().EndsWith(".xml", StringComparison.Ordinal))
+                        if (!string.IsNullOrEmpty(fileName) && fileName.EndsWith(".xml", StringComparison.OrdinalIgnoreCase))
                         {
                             string[] arr = File.ReadAllLines(fileName, Utilities.GetEncodingFromFile(fileName));
                             var sb = new StringBuilder();
@@ -9243,7 +9243,7 @@ namespace Nikse.SubtitleEdit.Forms
                 ShowStatus(_language.SubtitleImportedFromMatroskaFile);
                 _subtitle.Renumber(1);
                 _subtitle.WasLoadedWithFrameNumbers = false;
-                if (fileName.ToLower().EndsWith(".mkv") || fileName.ToLower().EndsWith(".mks"))
+                if (fileName.EndsWith(".mkv", StringComparison.OrdinalIgnoreCase) || fileName.EndsWith(".mks", StringComparison.OrdinalIgnoreCase))
                 {
                     _fileName = fileName.Substring(0, fileName.Length - 4);
                     Text = Title + " - " + _fileName;
@@ -10091,7 +10091,7 @@ namespace Nikse.SubtitleEdit.Forms
                 ShowStatus(_language.SubtitleImportedFromMatroskaFile);
                 _subtitle.Renumber(1);
                 _subtitle.WasLoadedWithFrameNumbers = false;
-                if (fileName.ToLower().EndsWith(".mp4") || fileName.ToLower().EndsWith(".m4v"))
+                if (fileName.EndsWith(".mp4", StringComparison.OrdinalIgnoreCase) || fileName.EndsWith(".m4v", StringComparison.OrdinalIgnoreCase))
                 {
                     _fileName = fileName.Substring(0, fileName.Length - 4);
                     Text = Title + " - " + _fileName;

src/Forms/ModifySelection.cs

@@ -165,7 +165,7 @@ namespace Nikse.SubtitleEdit.Forms
                         }
                         else if (comboBoxRule.SelectedIndex == FunctionEndsWith) // Ends with
                         {
-                            if (checkBoxCaseSensitive.Checked && p.Text.EndsWith(text) || !checkBoxCaseSensitive.Checked && p.Text.ToLower().EndsWith(text.ToLower()))
+                            if (checkBoxCaseSensitive.Checked && p.Text.EndsWith(text) || !checkBoxCaseSensitive.Checked && p.Text.EndsWith(text, StringComparison.OrdinalIgnoreCase))
                                 AddToListView(p, i);
                         }
                         else if (comboBoxRule.SelectedIndex == FunctionNotContains) // Not contains

src/Forms/SpellCheck.cs

@@ -486,12 +486,12 @@ namespace Nikse.SubtitleEdit.Forms
                     {
                         _namesEtcList.Add(ChangeWord);
                         _namesEtcListUppercase.Add(ChangeWord.ToUpper());
-                        if (_languageName.StartsWith("en_") && !ChangeWord.ToLower().EndsWith('s'))
+                        if (_languageName.StartsWith("en_") && !ChangeWord.EndsWith("s", StringComparison.OrdinalIgnoreCase))
                         {
                             _namesEtcList.Add(ChangeWord + "s");
                             _namesEtcListUppercase.Add(ChangeWord.ToUpper() + "S");
                         }
-                        if (!ChangeWord.ToLower().EndsWith('s'))
+                        if (!ChangeWord.EndsWith("s", StringComparison.OrdinalIgnoreCase))
                         {
                             _namesEtcListWithApostrophe.Add(ChangeWord + "'s");
                             _namesEtcListUppercase.Add(ChangeWord.ToUpper() + "'S");
@@ -711,7 +711,7 @@ namespace Nikse.SubtitleEdit.Forms
                         }
 
                         if (!correct && Configuration.Settings.Tools.SpellCheckEnglishAllowInQuoteAsIng &&
-                            _languageName.StartsWith("en_") && _currentWord.ToLower().EndsWith("in'"))
+                            _languageName.StartsWith("en_") && _currentWord.EndsWith("in'", StringComparison.OrdinalIgnoreCase))
                         {
                             correct = DoSpell(_currentWord.TrimEnd('\'') + "g");
                         }
@@ -1270,12 +1270,12 @@ namespace Nikse.SubtitleEdit.Forms
                         {
                             _namesEtcList.Remove(undo.UndoWord);
                             _namesEtcListUppercase.Remove(undo.UndoWord.ToUpper());
-                            if (_languageName.StartsWith("en_") && !undo.UndoWord.ToLower().EndsWith('s'))
+                            if (_languageName.StartsWith("en_") && !undo.UndoWord.EndsWith("s", StringComparison.OrdinalIgnoreCase))
                             {
                                 _namesEtcList.Remove(undo.UndoWord + "s");
                                 _namesEtcListUppercase.Remove(undo.UndoWord.ToUpper() + "S");
                             }
-                            if (!undo.UndoWord.ToLower().EndsWith('s'))
+                            if (!undo.UndoWord.EndsWith("s", StringComparison.OrdinalIgnoreCase))
                             {
                                 _namesEtcListWithApostrophe.Remove(undo.UndoWord + "'s");
                                 _namesEtcListUppercase.Remove(undo.UndoWord.ToUpper() + "'S");

src/Logic/OCR/OcrFixEngine.cs

@@ -1551,7 +1551,7 @@ namespace Nikse.SubtitleEdit.Logic.Ocr
                         correct = true; // already fixed
 
                     if (!correct && Configuration.Settings.Tools.SpellCheckEnglishAllowInQuoteAsIng && wordNotEndTrimmed.EndsWith('\'') &&
-                        SpellCheckDictionaryName.StartsWith("en_") && word.ToLower().EndsWith("in"))
+                        SpellCheckDictionaryName.StartsWith("en_") && word.EndsWith("in", StringComparison.OrdinalIgnoreCase))
                     {
                         correct = DoSpell(word + "g");
                     }

src/Logic/Spellcheck/Hunspell.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 
 namespace Nikse.SubtitleEdit.Logic.SpellCheck
@@ -12,7 +13,7 @@ namespace Nikse.SubtitleEdit.Logic.SpellCheck
                 return new MacHunspell(dictionary + ".aff", dictionary + ".dic");
 
             // Finnish is uses Voikko (not available via hunspell)
-            if (dictionary.ToLower().EndsWith("fi_fi"))
+            if (dictionary.EndsWith("fi_fi", StringComparison.OrdinalIgnoreCase))
                 return new VoikkoSpellCheck(Configuration.BaseDirectory, Configuration.DictionariesFolder);
 
             return new WindowsHunspell(dictionary + ".aff", dictionary + ".dic");

src/Logic/SubtitleFormats/AdvancedSubStationAlpha.cs

@@ -67,7 +67,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             var sb = new StringBuilder();
             lines.ForEach(line => sb.AppendLine(line));
             string all = sb.ToString();
-            if (!string.IsNullOrEmpty(fileName) && fileName.ToLower().EndsWith(".ass", StringComparison.Ordinal) && !all.Contains("[V4 Styles]"))
+            if (!string.IsNullOrEmpty(fileName) && fileName.EndsWith(".ass", StringComparison.OrdinalIgnoreCase) && !all.Contains("[V4 Styles]"))
             {
             }
             else if (!all.ToLower().Contains("dialogue:"))

src/Logic/SubtitleFormats/AvidDvd.cs

@@ -34,7 +34,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && fileName.ToLower().EndsWith(".dost"))
+            if (fileName != null && fileName.EndsWith(".dost", StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/AvidStl.cs

@@ -139,7 +139,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                             return true;
                         }
 
-                        if (fileName.ToLower().EndsWith(".stl") &&
+                        if (fileName.EndsWith(".stl", StringComparison.OrdinalIgnoreCase) &&
                             buffer.Length > 1283 &&
                             buffer[1024] == 0 &&
                             buffer[1025] == 1 &&

src/Logic/SubtitleFormats/CapMakerPlus.cs

@@ -144,7 +144,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 FileInfo fi = new FileInfo(fileName);
                 if (fi.Length >= 640 && fi.Length < 1024000) // not too small or too big
                 {
-                    if (fileName.ToLower().EndsWith(".cap"))
+                    if (fileName.EndsWith(".cap", StringComparison.OrdinalIgnoreCase))
                     {
                         byte[] buffer = Utilities.ReadAllBytes(fileName);
                         if (buffer[0] == 0x2b) // "+"

src/Logic/SubtitleFormats/CaptionsInc.cs

@@ -113,7 +113,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
         {
             if (!string.IsNullOrEmpty(fileName) && File.Exists(fileName))
             {
-                if (!fileName.ToLower().EndsWith(".cin"))
+                if (!fileName.EndsWith(".cin", StringComparison.OrdinalIgnoreCase))
                     return false;
 
                 var sub = new Subtitle();

src/Logic/SubtitleFormats/CheetahCaption.cs

@@ -203,7 +203,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 var fi = new FileInfo(fileName);
                 if (fi.Length >= 200 && fi.Length < 1024000) // not too small or too big
                 {
-                    if (fileName.ToLower().EndsWith(".cap"))
+                    if (fileName.EndsWith(".cap", StringComparison.OrdinalIgnoreCase))
                     {
                         byte[] buffer = Utilities.ReadAllBytes(fileName);
                         for (int i = 0; i < buffer.Length - 20; i++)

src/Logic/SubtitleFormats/Chk.cs

@@ -29,7 +29,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName.ToLower().EndsWith(".chk"))
+            if (fileName.EndsWith(".chk", StringComparison.OrdinalIgnoreCase))
             {
                 var buffer = Utilities.ReadAllBytes(fileName);
                 return buffer.Length > 0 && buffer[0] == 0x1d;

src/Logic/SubtitleFormats/ELRStudioClosedCaption.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Text;
 
@@ -34,7 +35,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 var fi = new FileInfo(fileName);
                 if (fi.Length >= 640 && fi.Length < 1024000) // not too small or too big
                 {
-                    if (fileName.ToLower().EndsWith(".elr"))
+                    if (fileName.EndsWith(".elr", StringComparison.OrdinalIgnoreCase))
                     {
                         byte[] buffer = Utilities.ReadAllBytes(fileName);
                         byte[] compareBuffer = { 0x05, 0x01, 0x0D, 0x15, 0x11, 0x00, 0xA9, 0x00, 0x45, 0x00, 0x6C, 0x00, 0x72, 0x00, 0x6F, 0x00, 0x6D, 0x00, 0x20, 0x00, 0x53, 0x00, 0x74, 0x00, 0x75, 0x00, 0x64, 0x00, 0x69, 0x00, 0x6F, 0x00 };

src/Logic/SubtitleFormats/Ebu.cs

@@ -586,7 +586,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                             header.DiskFormatCode.StartsWith("STL50") ||
                             header.DiskFormatCode.StartsWith("STL60"))
                         {
-                            return Utilities.IsInteger(header.CodePageNumber) || fileName.ToLower().EndsWith("stl");
+                            return Utilities.IsInteger(header.CodePageNumber) || fileName.EndsWith("stl", StringComparison.OrdinalIgnoreCase);
                         }
                     }
                     catch

src/Logic/SubtitleFormats/F4Rtf.cs

@@ -23,7 +23,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/F4Text.cs

@@ -30,7 +30,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/F4Xml.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Text;
 using System.Xml;
 
@@ -23,7 +24,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/ItunesTimedText.cs

@@ -26,7 +26,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             return base.IsMine(lines, fileName);

src/Logic/SubtitleFormats/NciCaption.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Text;
 
@@ -34,7 +35,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 var fi = new FileInfo(fileName);
                 if (fi.Length >= 640 && fi.Length < 1024000) // not too small or too big
                 {
-                    if (fileName.ToLower().EndsWith(".cap"))
+                    if (fileName.EndsWith(".cap", StringComparison.OrdinalIgnoreCase))
                     {
                         byte[] buffer = Utilities.ReadAllBytes(fileName);
 

src/Logic/SubtitleFormats/Pac.cs

@@ -948,7 +948,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                             //buffer[21] < 10 && // start from number
                             //buffer[22] == 0 &&
                             buffer[23] == 0x60 &&
-                            fileName.ToLower().EndsWith(".pac"))
+                            fileName.EndsWith(".pac", StringComparison.OrdinalIgnoreCase))
                             return true;
                     }
                 }

src/Logic/SubtitleFormats/Sami.cs

@@ -326,7 +326,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                     text = text.Remove(0, text.IndexOf('>') + 1);
                 text = text.TrimEnd();
 
-                if (text.ToLower().EndsWith("</sync>", StringComparison.Ordinal))
+                if (text.EndsWith("</sync>", StringComparison.OrdinalIgnoreCase))
                     text = text.Substring(0, text.Length - 7).TrimEnd();
 
                 if (text.EndsWith("</p>", StringComparison.Ordinal) || text.EndsWith("</P>", StringComparison.Ordinal))

src/Logic/SubtitleFormats/Spruce.cs

@@ -107,7 +107,7 @@ $ColorIndex4    = 3
             _errorCount = 0;
             subtitle.Paragraphs.Clear();
             var regexTimeCodes = new Regex(@"^\d\d:\d\d:\d\d:\d\d,\d\d:\d\d:\d\d:\d\d,.+", RegexOptions.Compiled);
-            if (fileName != null && fileName.ToLower().EndsWith(".stl")) // allow empty text if extension is ".stl"...
+            if (fileName != null && fileName.EndsWith(".stl", StringComparison.OrdinalIgnoreCase)) // allow empty text if extension is ".stl"...
                 regexTimeCodes = new Regex(@"^\d\d:\d\d:\d\d:\d\d,\d\d:\d\d:\d\d:\d\d,", RegexOptions.Compiled);
             foreach (string line in lines)
             {

src/Logic/SubtitleFormats/Spt.cs

@@ -89,7 +89,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
                         if (buffer[00] > 10 &&
                             buffer[01] == 0 &&
-                            fileName.ToLower().EndsWith(".spt"))
+                            fileName.EndsWith(".spt", StringComparison.OrdinalIgnoreCase))
                             return true;
                     }
                 }

src/Logic/SubtitleFormats/Ultech130.cs

@@ -191,7 +191,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 var fi = new FileInfo(fileName);
                 if (fi.Length >= 200 && fi.Length < 1024000) // not too small or too big
                 {
-                    if (fileName.ToLower().EndsWith(".ult") || fileName.ToLower().EndsWith(".uld")) //  drop frame is often named uld, and ult for non-drop
+                    if (fileName.EndsWith(".ult", StringComparison.OrdinalIgnoreCase) || fileName.EndsWith(".uld", StringComparison.OrdinalIgnoreCase)) //  drop frame is often named uld, and ult for non-drop
                     {
                         byte[] buffer = Utilities.ReadAllBytes(fileName);
                         string id = Encoding.ASCII.GetString(buffer, 0, UltechId.Length);

src/Logic/SubtitleFormats/UnknownSubtitle17.cs

@@ -145,7 +145,7 @@ DIGITAL_CINEMA=YES
                             if (line.ToLower().StartsWith("[i]"))
                             {
                                 s = "<i>" + s.Remove(0, 3);
-                                if (s.ToLower().EndsWith("[/i]"))
+                                if (s.EndsWith("[/i]", StringComparison.OrdinalIgnoreCase))
                                     s = s.Remove(s.Length - 4, 4);
                                 s += "</i>";
                             }

src/Logic/SubtitleFormats/UnknownSubtitle24.cs

@@ -23,7 +23,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/UnknownSubtitle37.cs

@@ -23,7 +23,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/UnknownSubtitle39.cs

@@ -23,7 +23,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/SubtitleFormats/UnknownSubtitle45.cs

@@ -28,7 +28,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
         public override bool IsMine(List<string> lines, string fileName)
         {
-            if (fileName != null && !fileName.ToLower().EndsWith(Extension))
+            if (fileName != null && !fileName.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
                 return false;
 
             var subtitle = new Subtitle();

src/Logic/Utilities.cs

@@ -971,7 +971,7 @@ namespace Nikse.SubtitleEdit.Logic
                         { // keep utf-8 encoding if it's default
                             encoding = Encoding.UTF8;
                         }
-                        else if (couldBeUtf8 && fileName.ToLower().EndsWith(".xml", StringComparison.Ordinal) && Encoding.Default.GetString(buffer).ToLower().Replace("'", "\"").Contains("encoding=\"utf-8\""))
+                        else if (couldBeUtf8 && fileName.EndsWith(".xml", StringComparison.OrdinalIgnoreCase) && Encoding.Default.GetString(buffer).ToLower().Replace("'", "\"").Contains("encoding=\"utf-8\""))
                         { // keep utf-8 encoding for xml files with utf-8 in header (without any utf-8 encoded characters, but with only allowed utf-8 characters)
                             encoding = Encoding.UTF8;
                         }

src/Logic/VideoPlayers/LibVlcDynamic.cs

@@ -478,7 +478,7 @@ namespace Nikse.SubtitleEdit.Logic.VideoPlayers
 
             if (!string.IsNullOrEmpty(Configuration.Settings.General.VlcLocation))
             {
-                if (Configuration.Settings.General.VlcLocation.ToUpper().EndsWith(".exe", StringComparison.Ordinal))
+                if (Configuration.Settings.General.VlcLocation.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
                     Configuration.Settings.General.VlcLocation = Path.GetDirectoryName(Configuration.Settings.General.VlcLocation);
 
                 path = Path.Combine(Configuration.Settings.General.VlcLocation, fileName);
@@ -491,7 +491,7 @@ namespace Nikse.SubtitleEdit.Logic.VideoPlayers
                 try
                 {
                     path = Configuration.Settings.General.VlcLocationRelative;
-                    if (path.ToUpper().EndsWith(".exe", StringComparison.Ordinal))
+                    if (path.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
                         path = Path.GetDirectoryName(path);
 
                     path = Path.Combine(path, fileName);