Allow user defined `NewLine` sequence

src/Generator/Generators/CodeGenerator.cs

@@ -140,11 +140,13 @@ namespace CppSharp.Generators
 
             var lines = new List<string>();
 
-            if (comment.BriefText.Contains("\n"))
+            if (comment.BriefText.Contains('\n'))
             {
+                var commentLines = HtmlEncoder.HtmlEncode(comment.BriefText)
+                    .Split('\n', '\r');
+
                 lines.Add("<summary>");
-                foreach (string line in HtmlEncoder.HtmlEncode(comment.BriefText).Split(
-                                            Environment.NewLine.ToCharArray()))
+                foreach (string line in commentLines)
                 {
                     if (string.IsNullOrWhiteSpace(line))
                         continue;

src/Generator/Passes/GetterSetterToPropertyPass.cs

@@ -334,8 +334,8 @@ namespace CppSharp.Passes
                 Method setter = property.SetMethod;
                 if (getter != setter && setter?.Comment != null)
                 {
-                    comment.BriefText += Environment.NewLine + setter.Comment.BriefText;
-                    comment.Text += Environment.NewLine + setter.Comment.Text;
+                    comment.BriefText += TextGenerator.NewLineChar + setter.Comment.BriefText;
+                    comment.Text += TextGenerator.NewLineChar + setter.Comment.Text;
                     comment.FullComment.Blocks.AddRange(setter.Comment.FullComment.Blocks);
                 }
             }

src/Generator/Utils/BlockGenerator.cs

@@ -135,12 +135,12 @@ namespace CppSharp
                 if (previousBlock != null &&
                     (previousBlock.NewLineKind == NewLineKind.BeforeNextBlock ||
                      (previousBlock.NewLineKind == NewLineKind.IfNotEmpty && !previousBlockEmpty)))
-                    builder.AppendLine();
+                    builder.Append(TextGenerator.NewLineChar);
 
                 builder.Append(childText);
 
                 if (childBlock.NewLineKind == NewLineKind.Always)
-                    builder.AppendLine();
+                    builder.Append(TextGenerator.NewLineChar);
 
                 previousBlock = childBlock;
                 previousBlockEmpty = childText.Length == 0;
@@ -318,7 +318,7 @@ namespace CppSharp
             private readonly BlockGenerator generator;
             private readonly NewLineKind next;
 
-            public PushedBlock(BlockGenerator generator, NewLineKind next) 
+            public PushedBlock(BlockGenerator generator, NewLineKind next)
             {
                 this.generator = generator;
                 this.next = next;

src/Generator/Utils/TextGenerator.cs

@@ -21,9 +21,11 @@ namespace CppSharp
 
     public class TextGenerator : ITextGenerator
     {
+        public static string NewLineChar = "\n";
+
         public const uint DefaultIndentation = 4;
 
-        public StringBuilder StringBuilder = new StringBuilder();
+        public StringBuilder StringBuilder = new();
         public bool IsStartOfLine { get; set; }
         public bool NeedsNewLine { get; set; }
         public uint CurrentIndentation { get; set; }
@@ -54,11 +56,9 @@ namespace CppSharp
                 msg = string.Format(msg, args);
 
             if (IsStartOfLine && !string.IsNullOrWhiteSpace(msg))
-                StringBuilder.Append(new string(' ',
-                    (int)(CurrentIndentation * DefaultIndentation)));
+                StringBuilder.Append(new string(' ', (int)(CurrentIndentation * DefaultIndentation)));
 
-            if (msg.Length > 0)
-                IsStartOfLine = msg.EndsWith(Environment.NewLine);
+            IsStartOfLine = msg.Length > 0 && msg.EndsWith(NewLineChar);
 
             StringBuilder.Append(msg);
         }
@@ -90,7 +90,7 @@ namespace CppSharp
 
         public void NewLine()
         {
-            StringBuilder.AppendLine(string.Empty);
+            StringBuilder.Append(NewLineChar);
             IsStartOfLine = true;
         }