Look at my bounty!

Readme.md

@@ -49,8 +49,18 @@ This step is optional, but highly recommended for users working with a version o
 These versions of Visual Studio do not support the NuGet Package Manager extension, but the C# target for ANTLR 4 does support .NET 2.0 and higher so you should be able to use the [command line NuGet utility](http://docs.nuget.org/docs/start-here/installing-nuget) instead of working directly within Visual Studio.
 
 ### Step 4: Install ANTLR 4 support in a C# project
-
-#### For nearly all Visual Studio 2010 and newer installations
+#### For Visual Studio 2017
+1. Create or open a C# project which will use ANTLR
+2. Right click the top-level solution node in the Solution Explorer window and select **Manage NuGet Packages for Solution...**
+3. In the upper left, choose **Browse** and then choose **nuget.org** as the **Package source**
+4. Next to the **Search** box, check **Include prerelease**
+5. In the **Search** box, type **Antlr4** to search for the package
+6. In the search results, locate and select the package called **Antlr4**. Verify that the name is listed as exactly **Antlr4**.
+7. In the right pane, select the C# projects you want to use ANTLR4 by clicking their checkboxes
+8. Click **Install** under the list of projects
+9. Approve changes and accept license agreements, if prompted.
+
+#### For nearly all Visual Studio 2010 - 2015 installations
 
 1. Create or open a C# project which will use ANTLR
 2. Right click the top-level solution node in the Solution Explorer window and select **Manage NuGet Packages for Solution...**

appveyor.yml

@@ -10,6 +10,7 @@ build_script:
 test_script:
 - vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\net45\Antlr4.Runtime.Test.dll"
 - vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\net452\Antlr4.Runtime.Test.dll"
+- vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\net472\Antlr4.Runtime.Test.dll"
 - vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\portable40-net40+sl5+win8+wp8+wpa81\Antlr4.Runtime.Test.dll"
 - vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\net40\Antlr4.Runtime.Test.dll"
 - vstest.console /logger:Appveyor /TestCaseFilter:"TestCategory=runtime-suite" "C:\projects\antlr4cs\runtime\CSharp\Antlr4.Runtime.Test\bin\%CONFIGURATION%\net35\Antlr4.Runtime.Test.dll"

build/Antlr4.CodeGenerator.nuspec

@@ -30,11 +30,17 @@
     <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\net45\Antlr3.Runtime.dll" target="tools\net45" />
     <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\net45\Tool\**\*.stg" target="tools\net45\Tool" />
 
-    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.dll" target="tools\netstandard" />
-    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.Runtime.dll" target="tools\netstandard" />
-    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.StringTemplate.dll" target="tools\netstandard" />
-    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr3.Runtime.dll" target="tools\netstandard" />
-    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Tool\**\*.stg" target="tools\netstandard\Tool" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.dll" target="tools\netstandard1.5" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.Runtime.dll" target="tools\netstandard1.5" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr4.StringTemplate.dll" target="tools\netstandard1.5" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Antlr3.Runtime.dll" target="tools\netstandard1.5" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard1.5\Tool\**\*.stg" target="tools\netstandard1.5\Tool" />
+
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard2.0\Antlr4.dll" target="tools\netstandard2.0" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard2.0\Antlr4.Runtime.dll" target="tools\netstandard2.0" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard2.0\Antlr4.StringTemplate.dll" target="tools\netstandard2.0" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard2.0\Antlr3.Runtime.dll" target="tools\netstandard2.0" />
+    <file src="..\runtime\CSharp\Antlr4.Tool\bin\$Configuration$\netstandard2.0\Tool\**\*.stg" target="tools\netstandard2.0\Tool" />
 
     <!-- Build Configuration -->
 
@@ -48,6 +54,7 @@
     <!-- Build Tasks -->
 
     <file src="..\runtime\CSharp\Antlr4BuildTasks\bin\$Configuration$\net40\Antlr4BuildTasks.dll" target="tools\net40"/>
-    <file src="..\runtime\CSharp\Antlr4BuildTasks\bin\$Configuration$\netstandard1.5\Antlr4BuildTasks.dll" target="tools\netstandard"/>
+    <file src="..\runtime\CSharp\Antlr4BuildTasks\bin\$Configuration$\netstandard1.5\Antlr4BuildTasks.dll" target="tools\netstandard1.5"/>
+    <file src="..\runtime\CSharp\Antlr4BuildTasks\bin\$Configuration$\netstandard2.0\Antlr4BuildTasks.dll" target="tools\netstandard2.0"/>
   </files>
 </package>

build/Antlr4.Runtime.nuspec

@@ -27,6 +27,7 @@
       <group targetFramework="netstandard1.1">
         <dependency id="NETStandard.Library" version="1.6.0"/>
       </group>
+      <group targetFramework="netstandard2.0" />
     </dependencies>
   </metadata>
   <files>
@@ -64,6 +65,10 @@
     <file src="..\runtime\CSharp\Antlr4.Runtime\bin\$Configuration$\netstandard1.1\Antlr4.Runtime.pdb" target="lib\netstandard1.1"/>
     <file src="..\runtime\CSharp\Antlr4.Runtime\bin\$Configuration$\netstandard1.1\Antlr4.Runtime.xml" target="lib\netstandard1.1"/>
 
+    <file src="..\runtime\CSharp\Antlr4.Runtime\bin\$Configuration$\netstandard2.0\Antlr4.Runtime.dll" target="lib\netstandard2.0"/>
+    <file src="..\runtime\CSharp\Antlr4.Runtime\bin\$Configuration$\netstandard2.0\Antlr4.Runtime.pdb" target="lib\netstandard2.0"/>
+    <file src="..\runtime\CSharp\Antlr4.Runtime\bin\$Configuration$\netstandard2.0\Antlr4.Runtime.xml" target="lib\netstandard2.0"/>
+
     <!-- Source Code -->
 
     <file exclude="..\runtime\CSharp\Antlr4.Runtime\obj\**\*.cs" src="..\runtime\CSharp\Antlr4.Runtime\**\*.cs" target="src"/>

build/DotnetValidation/DotnetValidation.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net20;net30;net35;net35-cf;net40;net45;netcoreapp1.1;portable40-net40+sl5+win8+wp8+wpa81</TargetFrameworks>
+    <TargetFrameworks>net20;net30;net35;net35-cf;net40;net45;netcoreapp1.1;netcoreapp2.1;portable40-net40+sl5+win8+wp8+wpa81</TargetFrameworks>
     <EnableDefaultNoneItems>False</EnableDefaultNoneItems>
     <Antlr4UseCSharpGenerator>True</Antlr4UseCSharpGenerator>
   </PropertyGroup>

build/DotnetValidationJavaCodegen/DotnetValidation.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net20;net30;net35;net35-cf;net40;net45;netcoreapp1.1;portable40-net40+sl5+win8+wp8+wpa81</TargetFrameworks>
+    <TargetFrameworks>net20;net30;net35;net35-cf;net40;net45;netcoreapp1.1;netcoreapp2.1;portable40-net40+sl5+win8+wp8+wpa81</TargetFrameworks>
     <EnableDefaultNoneItems>False</EnableDefaultNoneItems>
     <Antlr4UseCSharpGenerator>False</Antlr4UseCSharpGenerator>
   </PropertyGroup>

build/build.ps1

@@ -110,7 +110,7 @@ If (-not (Test-Path $nuget)) {
 		mkdir '..\runtime\CSharp\.nuget'
 	}
 
-	$nugetSource = 'https://dist.nuget.org/win-x86-commandline/latest/nuget.exe'
+	$nugetSource = 'https://dist.nuget.org/win-x86-commandline/v5.7.0/nuget.exe'
 	Invoke-WebRequest $nugetSource -OutFile $nuget
 	If (-not $?) {
 		$host.ui.WriteErrorLine('Unable to download NuGet executable, aborting!')
@@ -131,6 +131,11 @@ If ($Logger) {
 }
 
 &$nuget 'restore' $SolutionPath -Project2ProjectTimeOut 1200
+if (-not $?) {
+	$host.ui.WriteErrorLine('Restore failed, aborting!')
+	Exit $LASTEXITCODE
+}
+
 &$msbuild '/nologo' '/m' '/nr:false' "/t:$Target" $LoggerArgument "/verbosity:$Verbosity" "/p:Configuration=$BuildConfig" "/p:VisualStudioVersion=$VisualStudioVersion" "/p:KeyConfiguration=$KeyConfiguration" $SolutionPath
 if (-not $?) {
 	$host.ui.WriteErrorLine('Build failed, aborting!')
@@ -187,6 +192,13 @@ If (-not $NoValidate) {
 		Exit $LASTEXITCODE
 	}
 
+	git 'clean' '-dxf' 'DotnetValidationJavaCodegen'
+	dotnet 'run' '--project' '.\DotnetValidationJavaCodegen\DotnetValidation.csproj' '--framework' 'netcoreapp2.1'
+	if (-not $?) {
+		$host.ui.WriteErrorLine('Build failed, aborting!')
+		Exit $LASTEXITCODE
+	}
+
 	git 'clean' '-dxf' 'DotnetValidationJavaCodegen'
 	&$nuget 'restore' 'DotnetValidationJavaCodegen'
 	&$msbuild '/nologo' '/m' '/nr:false' '/t:Rebuild' $LoggerArgument "/verbosity:$Verbosity" "/p:Configuration=$BuildConfig" '.\DotnetValidationJavaCodegen\DotnetValidation.sln'
@@ -241,6 +253,13 @@ If (-not $NoValidate) {
 		Exit $LASTEXITCODE
 	}
 
+	git 'clean' '-dxf' 'DotnetValidation'
+	dotnet 'run' '--project' '.\DotnetValidation\DotnetValidation.csproj' '--framework' 'netcoreapp2.1'
+	if (-not $?) {
+		$host.ui.WriteErrorLine('Build failed, aborting!')
+		Exit $LASTEXITCODE
+	}
+
 	git 'clean' '-dxf' 'DotnetValidation'
 	&$nuget 'restore' 'DotnetValidation'
 	&$msbuild '/nologo' '/m' '/nr:false' '/t:Rebuild' $LoggerArgument "/verbosity:$Verbosity" "/p:Configuration=$BuildConfig" '.\DotnetValidation\DotnetValidation.sln'

runtime/CSharp/Antlr4.Runtime.Test/Antlr4.Runtime.Test.csproj

@@ -3,7 +3,8 @@
 
   <PropertyGroup>
     <!-- Note: net452 is used for testing the netstandard1.1 target. -->
-    <TargetFrameworks>net20;net30;net35;portable40-net40+sl5+win8+wp8+wpa81;net40;net45;net452</TargetFrameworks>
+    <!-- Note: net472 is used for testing the netstandard2.0 target. -->
+    <TargetFrameworks>net20;net30;net35;portable40-net40+sl5+win8+wp8+wpa81;net40;net45;net452;net472</TargetFrameworks>
     <EnableDefaultNoneItems>False</EnableDefaultNoneItems>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
 
@@ -109,6 +110,16 @@
         </ProjectReference>
       </ItemGroup>
     </When>
+    <When Condition="'$(TargetFramework)' == 'net472'">
+      <PropertyGroup>
+        <DefineConstants>$(DefineConstants);NET45;NET45PLUS;NET40PLUS;NET35PLUS;NET30PLUS;NET20PLUS</DefineConstants>
+      </PropertyGroup>
+      <ItemGroup>
+        <ProjectReference Include="..\Antlr4.Runtime\Antlr4.Runtime.csproj">
+          <SetTargetFramework>TargetFramework=netstandard2.0</SetTargetFramework>
+        </ProjectReference>
+      </ItemGroup>
+    </When>
   </Choose>
 
   <PropertyGroup>

runtime/CSharp/Antlr4.Runtime/Antlr4.Runtime.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.1;net20;net30;net35-cf;net35-client;portable40-net40+sl5+win8+wp8+wpa81;net40-client;net45</TargetFrameworks>
+    <TargetFrameworks>netstandard1.1;netstandard2.0;net20;net30;net35-cf;net35-client;portable40-net40+sl5+win8+wp8+wpa81;net40-client;net45</TargetFrameworks>
     <EnableDefaultNoneItems>False</EnableDefaultNoneItems>
 
     <AssemblyVersion>4.6.0.0</AssemblyVersion>

runtime/CSharp/Antlr4.Runtime/AntlrFileStream.cs

@@ -1,7 +1,7 @@
 // Copyright (c) Terence Parr, Sam Harwell. All Rights Reserved.
 // Licensed under the BSD License. See LICENSE.txt in the project root for license information.
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
 
 using Antlr4.Runtime.Misc;
 using Antlr4.Runtime.Sharpen;

runtime/CSharp/Antlr4.Runtime/Atn/ATNState.cs

@@ -179,7 +179,7 @@ public virtual void AddTransition(int index, Antlr4.Runtime.Atn.Transition e)
             {
                 if (epsilonOnlyTransitions != e.IsEpsilon)
                 {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
                     System.Console.Error.WriteLine("ATN state {0} has both epsilon and non-epsilon transitions.", stateNumber);
 #endif
                     epsilonOnlyTransitions = false;

runtime/CSharp/Antlr4.Runtime/Atn/LexerATNSimulator.cs

@@ -12,7 +12,7 @@ namespace Antlr4.Runtime.Atn
     /// <summary>"dup" of ParserInterpreter</summary>
     public class LexerATNSimulator : ATNSimulator
     {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         public const bool debug = false;
 
         public const bool dfa_debug = false;
@@ -247,7 +247,7 @@ protected internal virtual int ExecATN([NotNull] ICharStream input, [NotNull] DF
         protected internal virtual DFAState GetExistingTargetState([NotNull] DFAState s, int t)
         {
             DFAState target = s.GetTarget(t);
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             if (debug && target != null)
             {
                 System.Console.Out.WriteLine("reuse state " + s.stateNumber + " edge to " + target.stateNumber);

runtime/CSharp/Antlr4.Runtime/Atn/ParserATNSimulator.cs

@@ -279,7 +279,7 @@ namespace Antlr4.Runtime.Atn
     public class ParserATNSimulator : ATNSimulator
     {
 #pragma warning disable 0162 // Unreachable code detected
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         public const bool debug = false;
 
         public const bool dfa_debug = false;
@@ -566,7 +566,7 @@ protected internal virtual int ExecDFA([NotNull] DFA dfa, [NotNull] ITokenStream
                 DFAState target = GetExistingTargetState(s, t);
                 if (target == null)
                 {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
                     if (dfa_debug && t >= 0)
                     {
                         System.Console.Out.WriteLine("no edge for " + parser.Vocabulary.GetDisplayName(t));
@@ -1793,15 +1793,15 @@ protected internal virtual BitSet EvalSemanticContext([NotNull] DFAState.PredPre
                     continue;
                 }
                 bool evaluatedResult = EvalSemanticContext(pair.pred, outerContext, pair.alt);
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
                 if (debug || dfa_debug)
                 {
                     System.Console.Out.WriteLine("eval pred " + pair + "=" + evaluatedResult);
                 }
 #endif
                 if (evaluatedResult)
                 {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
                     if (debug || dfa_debug)
                     {
                         System.Console.Out.WriteLine("PREDICT " + pair.alt);
@@ -2385,7 +2385,7 @@ public virtual string GetLookaheadName(ITokenStream input)
             return GetTokenName(input.La(1));
         }
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         public virtual void DumpDeadEndConfigs([NotNull] NoViableAltException nvae)
         {
             System.Console.Error.WriteLine("dead end configs: ");
@@ -2570,7 +2570,7 @@ protected internal virtual DFAState AddDFAState([NotNull] DFA dfa, [NotNull] ATN
                 return newState;
             }
             DFAState added = dfa.AddState(newState);
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             if (debug && added == newState)
             {
                 System.Console.Out.WriteLine("adding new DFA state: " + newState);
@@ -2587,7 +2587,7 @@ protected internal virtual DFAState CreateDFAState([NotNull] DFA dfa, [NotNull]
 
         protected internal virtual void ReportAttemptingFullContext([NotNull] DFA dfa, [Nullable] BitSet conflictingAlts, [NotNull] SimulatorState conflictState, int startIndex, int stopIndex)
         {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             if (debug || retry_debug)
             {
                 Interval interval = Interval.Of(startIndex, stopIndex);
@@ -2602,7 +2602,7 @@ protected internal virtual void ReportAttemptingFullContext([NotNull] DFA dfa, [
 
         protected internal virtual void ReportContextSensitivity([NotNull] DFA dfa, int prediction, [NotNull] SimulatorState acceptState, int startIndex, int stopIndex)
         {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             if (debug || retry_debug)
             {
                 Interval interval = Interval.Of(startIndex, stopIndex);
@@ -2620,7 +2620,7 @@ protected internal virtual void ReportAmbiguity([NotNull] DFA dfa, DFAState D, i
         {
             // the DFA state from execATN() that had SLL conflicts
             // configs that LL not SLL considered conflicting
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             if (debug || retry_debug)
             {
                 Interval interval = Interval.Of(startIndex, stopIndex);

runtime/CSharp/Antlr4.Runtime/ConsoleErrorListener.cs

@@ -1,7 +1,7 @@
 // Copyright (c) Terence Parr, Sam Harwell. All Rights Reserved.
 // Licensed under the BSD License. See LICENSE.txt in the project root for license information.
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
 
 using Antlr4.Runtime.Sharpen;
 

runtime/CSharp/Antlr4.Runtime/DefaultErrorStrategy.cs

@@ -150,7 +150,7 @@ public virtual void ReportError(Parser recognizer, RecognitionException e)
                     }
                     else
                     {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
                         System.Console.Error.WriteLine("unknown recognition error type: " + e.GetType().FullName);
 #endif
                         NotifyErrorListeners(recognizer, e.Message, e);

runtime/CSharp/Antlr4.Runtime/Misc/RuleDependencyChecker.cs

@@ -457,7 +457,7 @@ private RuleDependencyChecker()
         {
         }
 
-#if PORTABLE
+#if PORTABLE && !NETSTANDARD2_0
         public interface ICustomAttributeProvider
         {
             object[] GetCustomAttributes(Type attributeType, bool inherit);
@@ -1012,7 +1012,7 @@ private RuleDependencyChecker()
         {
         }
 
-#if PORTABLE
+#if PORTABLE && !NETSTANDARD2_0
         public interface ICustomAttributeProvider
         {
             object[] GetCustomAttributes(Type attributeType, bool inherit);

runtime/CSharp/Antlr4.Runtime/Parser.cs

@@ -16,7 +16,7 @@ namespace Antlr4.Runtime
     /// <summary>This is all the parsing support code essentially; most of it is error recovery stuff.</summary>
     public abstract class Parser : Recognizer<IToken, ParserATNSimulator>
     {
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         public class TraceListener : IParseTreeListener
         {
             public virtual void EnterEveryRule(ParserRuleContext ctx)
@@ -122,7 +122,7 @@ public virtual void ExitEveryRule(ParserRuleContext ctx)
         /// <seealso cref="BuildParseTree"/>
         protected internal bool _buildParseTrees = true;
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         /// <summary>
         /// When
         /// <see cref="Trace"/>
@@ -183,7 +183,7 @@ public virtual void Reset()
             _ctx = null;
             _syntaxErrors = 0;
             matchedEOF = false;
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
             Trace = false;
 #endif
             _precedenceStack.Clear();
@@ -1131,7 +1131,7 @@ public virtual IList<string> GetDFAStrings()
             return s;
         }
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         /// <summary>For debugging and other purposes.</summary>
         public virtual void DumpDFA()
         {
@@ -1199,7 +1199,7 @@ public virtual bool Profile
             }
         }
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
         /// <summary>
         /// During a parse is sometimes useful to listen in on the rule entry and exit
         /// events as well as token matches.

runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs

@@ -18,7 +18,7 @@
 // COM, set the ComVisible attribute to true on that type.
 [assembly: ComVisible(false)]
 
-#if !PORTABLE
+#if !PORTABLE || NETSTANDARD2_0
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("bc228eb9-e79c-4e5a-a1b9-0434ea566bab")]
 #endif