Update code generators to use Encoding.UTF8

src/Tools/Source/CompilerGeneratorTools/Source/BoundTreeGenerator/Program.cs

@@ -3,6 +3,7 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Text;
 using System.Xml;
 using System.Xml.Serialization;
 
@@ -49,7 +50,7 @@ private static int Main(string[] args)
                 tree = (Tree)serializer.Deserialize(reader);
             }
 
-            using (var outfile = new StreamWriter(File.Open(outfilename, FileMode.Create)))
+            using (var outfile = new StreamWriter(File.Open(outfilename, FileMode.Create), Encoding.UTF8))
             {
                 BoundNodeClassWriter.Write(outfile, tree, targetLanguage);
             }

src/Tools/Source/CompilerGeneratorTools/Source/CSharpErrorFactsGenerator/Program.cs

@@ -128,7 +128,7 @@ public static int Main(string[] args)
             outputText.AppendLine("    }");
             outputText.AppendLine("}");
 
-            File.WriteAllText(outputPath, outputText.ToString());
+            File.WriteAllText(outputPath, outputText.ToString(), Encoding.UTF8);
 
             return 0;
         }

src/Tools/Source/CompilerGeneratorTools/Source/CSharpSyntaxGenerator/Program.cs

@@ -112,7 +112,7 @@ private static void WriteToFile(Tree tree, Action<TextWriter, Tree> writeAction,
 
             try
             {
-                using (var outFile = new StreamWriter(File.Open(outputFile, FileMode.Create)))
+                using (var outFile = new StreamWriter(File.Open(outputFile, FileMode.Create), Encoding.UTF8))
                 {
                     outFile.Write(text);
                 }

src/Tools/Source/CompilerGeneratorTools/Source/VisualBasicErrorFactsGenerator/Program.vb

@@ -43,7 +43,7 @@ Friend Module Program
 
         outputText.AppendLine("    End Module")
         outputText.AppendLine("End Namespace")
-        File.WriteAllText(outputPath, outputText.ToString())
+        File.WriteAllText(outputPath, outputText.ToString(), Encoding.UTF8)
 
         Return 0
     End Function

src/Tools/Source/CompilerGeneratorTools/Source/VisualBasicSyntaxGenerator/Program.vb

@@ -5,6 +5,7 @@ Imports System.Collections.Generic
 Imports System.Console
 Imports System.Runtime.InteropServices
 Imports System.Security.Cryptography
+Imports System.Text
 
 ''' <summary>
 ''' Contains the startup code, command line argument processing, and driving the execution of the tool.
@@ -97,7 +98,7 @@ Friend Module Program
     Public Sub WriteOutput(inputFile As String, outputFile As String, definition As ParseTree, outputKind As String, checksum As String)
         Select Case outputKind
             Case "/test"
-                Using output As New StreamWriter(New FileStream(outputFile, FileMode.Create, FileAccess.Write))
+                Using output As New StreamWriter(New FileStream(outputFile, FileMode.Create, FileAccess.Write), Encoding.UTF8)
 
                     WriteHeader(output, checksum)
                     output.WriteLine()
@@ -113,7 +114,7 @@ Friend Module Program
                 End Using
 
             Case "/gettext"
-                Using output As New StreamWriter(New FileStream(outputFile, FileMode.Create, FileAccess.Write))
+                Using output As New StreamWriter(New FileStream(outputFile, FileMode.Create, FileAccess.Write), Encoding.UTF8)
                     WriteHeader(output, checksum)
                     Dim syntaxFactsWriter As New SyntaxFactsWriter(definition)
                     syntaxFactsWriter.GenerateGetText(output)
@@ -132,7 +133,7 @@ Friend Module Program
         Dim internalFile = Path.Combine(outputPath, $"{prefix}.Internal.Generated.vb")
         Dim redNodeWriter As New RedNodeWriter(definition)
 
-        Using output As New StreamWriter(New FileStream(mainFile, FileMode.Create, FileAccess.Write))
+        Using output As New StreamWriter(New FileStream(mainFile, FileMode.Create, FileAccess.Write), Encoding.UTF8)
             WriteSyntaxHeader(output, checksum)
             redNodeWriter.WriteMainTreeAsCode(output)
 
@@ -143,13 +144,13 @@ Friend Module Program
             syntaxFactsWriter.GenerateFile(output)
         End Using
 
-        Using output As New StreamWriter(New FileStream(syntaxFile, FileMode.Create, FileAccess.Write))
+        Using output As New StreamWriter(New FileStream(syntaxFile, FileMode.Create, FileAccess.Write), Encoding.UTF8)
             WriteSyntaxHeader(output, checksum)
 
             redNodeWriter.WriteSyntaxTreeAsCode(output)
         End Using
 
-        Using output As New StreamWriter(New FileStream(internalFile, FileMode.Create, FileAccess.Write))
+        Using output As New StreamWriter(New FileStream(internalFile, FileMode.Create, FileAccess.Write), Encoding.UTF8)
             WriteSyntaxHeader(output, checksum)
 
             Dim greenNodeWriter As New GreenNodeWriter(definition)