Dispose of RichTextBox fixed

src/Logic/SubtitleFormats/CapMakerPlus.cs

@@ -212,6 +212,7 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                                 {
                                     System.Diagnostics.Debug.WriteLine(exception.Message);
                                 }
+                                rtBox.Dispose();
                             }
                             else if (italic)
                             {

src/Logic/SubtitleFormats/F4Rtf.cs

@@ -35,7 +35,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
         {
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = ToF4Text(subtitle, title);
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
@@ -59,8 +61,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
-
+            string text = rtBox.Text;
-            LoadF4TextSubtitle(subtitle, rtBox.Text);
+            rtBox.Dispose();
+            LoadF4TextSubtitle(subtitle, text);
         }
     }
 }

src/Logic/SubtitleFormats/ImageLogicAutocaption.cs

@@ -59,7 +59,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
             var rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = sb.ToString();
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         private TimeCode DecodeTimeCode(string timeCode)

src/Logic/SubtitleFormats/UnknownSubtitle16.cs

@@ -50,8 +50,8 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             var lines2 = new List<string>();
             foreach (string line in rtBox.Lines)
                 lines2.Add(line);
+            rtBox.Dispose();
             text = new StringBuilder();
-
             var u52 = new UnknownSubtitle52();
             u52.LoadSubtitle(subtitle, lines2, fileName);
             _errorCount = u52.ErrorCount;

src/Logic/SubtitleFormats/UnknownSubtitle21.cs

@@ -59,7 +59,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
             var rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = sb.ToString();
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         private TimeCode DecodeTimeCode(string timeCode)
@@ -79,19 +81,24 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string text = string.Empty;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                text = rtBox.Text.Replace("\r\n", "\n");
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             lines = new List<string>();
-            string text = rtBox.Text.Replace("\r\n", "\n");
             foreach (string line in text.Split('\n'))
                 lines.Add(line);
 

src/Logic/SubtitleFormats/UnknownSubtitle23.cs

@@ -88,19 +88,24 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string text = string.Empty;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                text = rtBox.Text.Replace("\r\n", "\n");
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             lines = new List<string>();
-            string text = rtBox.Text.Replace("\r\n", "\n");
             foreach (string line in text.Split('\n'))
                 lines.Add(line);
 

src/Logic/SubtitleFormats/UnknownSubtitle24.cs

@@ -35,7 +35,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
         {
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text =  base.ToText(subtitle, title);
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
@@ -49,18 +51,23 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r", string.Empty).Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
-            var arr = rtBox.Text.Replace("\r", string.Empty).Split('\n');
             lines = new List<string>();
             foreach (string s in arr)
                 lines.Add(s);

src/Logic/SubtitleFormats/UnknownSubtitle37.cs

@@ -35,7 +35,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
         {
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = base.ToText(subtitle, title);
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
@@ -49,19 +51,25 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r\n", "\n").Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             var list = new List<string>();
-            foreach (string s in rtBox.Text.Replace("\r\n", "\n").Split('\n'))
+            foreach (string s in arr)
                 list.Add(s);
             base.LoadSubtitle(subtitle, list, fileName);
         }

src/Logic/SubtitleFormats/UnknownSubtitle39.cs

@@ -35,7 +35,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
         {
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = base.ToText(subtitle, title);
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
@@ -49,19 +51,25 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r\n", "\n").Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             var list = new List<string>();
-            foreach (string s in rtBox.Text.Replace("\r\n", "\n").Split('\n'))
+            foreach (string s in arr)
                 list.Add(s);
             base.LoadSubtitle(subtitle, list, fileName);
         }

src/Logic/SubtitleFormats/UnknownSubtitle45.cs

@@ -56,7 +56,9 @@ ST 0 EB 3.10
             }
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = sb.ToString();
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         private string EncodeTimeCode(TimeCode time)
@@ -79,20 +81,26 @@ ST 0 EB 3.10
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r\n", "\n").Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             Paragraph p = null;
             subtitle.Paragraphs.Clear();
-            foreach (string line in rtBox.Text.Replace("\r\n", "\n").Split('\n'))
+            foreach (string line in arr)
             {
                 if (regexTimeCodes.IsMatch(line.Trim()))
                 {

src/Logic/SubtitleFormats/UnknownSubtitle55.cs

@@ -53,7 +53,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = sb.ToString();
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         private string EncodeTimeCode(TimeCode time)
@@ -72,22 +74,27 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r\n", "\n").Replace("\r", "\n").Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
-
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             bool expectStartTime = true;
             var p = new Paragraph();
             subtitle.Paragraphs.Clear();
-            foreach (string line in rtBox.Text.Replace("\r", "").Split('\n'))
+            foreach (string line in arr)
             {
                 string s = line.Trim().Replace("*", string.Empty);
                 var match = regexTimeCodes.Match(s);

src/Logic/SubtitleFormats/UnknownSubtitle58.cs

@@ -49,7 +49,9 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
 
             System.Windows.Forms.RichTextBox rtBox = new System.Windows.Forms.RichTextBox();
             rtBox.Text = sb.ToString();
-            return rtBox.Rtf;
+            string rtf = rtBox.Rtf;
+            rtBox.Dispose();
+            return rtf;
         }
 
         private string EncodeTimeCode(TimeCode time)
@@ -68,20 +70,26 @@ namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
             if (!rtf.StartsWith("{\\rtf"))
                 return;
 
+            string[] arr = null;
             var rtBox = new System.Windows.Forms.RichTextBox();
             try
             {
                 rtBox.Rtf = rtf;
+                arr = rtBox.Text.Replace("\r", "").Split('\n');
             }
             catch (Exception exception)
             {
                 System.Diagnostics.Debug.WriteLine(exception.Message);
                 return;
             }
+            finally
+            {
+                rtBox.Dispose();
+            }
 
             var p = new Paragraph();
             subtitle.Paragraphs.Clear();
-            foreach (string line in rtBox.Text.Replace("\r", "").Split('\n'))
+            foreach (string line in arr)
             {
                 string s = line.Trim();
                 if (s.StartsWith("[") && s.EndsWith(">") && s.Length > 13 && s.Substring(12, 1) == "]")