AnonymousObject - NotImplementedException

[LukeTOBrien]

I have just been converting my LINQ queries and I've come across a not implemented exception, it seems it doesn't like anonymous objects.

Here's an example that throws the exception:

Dim obj = New With
{
    .Name = "Hello",
    .Value = "World"
}

Expected:

var obj = new
{
    Name = "Hello",
    Value = "World"
}

Here is the stacktrace I get:

Error message:
----- Exception 1 of 1 -----
System.NotImplementedException: Microsoft.CodeAnalysis.VisualBasic.Syntax.AnonymousObjectCreationExpressionSyntax not implemented!
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.DefaultVisit(SyntaxNode node)
   at Microsoft.CodeAnalysis.VisualBasic.VisualBasicSyntaxVisitor`1.VisitAnonymousObjectCreationExpression(AnonymousObjectCreationExpressionSyntax node)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitAnonymousObjectCreationExpression(AnonymousObjectCreationExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.AnonymousObjectCreationExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitSingleLineLambdaExpression(SingleLineLambdaExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.SingleLineLambdaExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitSimpleArgument(SimpleArgumentSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.SimpleArgumentSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.<VisitArgumentList>b__56_0(ArgumentSyntax a)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.SeparatedList[TNode](IEnumerable`1 nodes)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitArgumentList(ArgumentListSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.ArgumentListSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitInvocationExpression(InvocationExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.InvocationExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.MemberAccessExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitInvocationExpression(InvocationExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.InvocationExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.MemberAccessExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitInvocationExpression(InvocationExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.InvocationExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.MemberAccessExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitInvocationExpression(InvocationExpressionSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.InvocationExpressionSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.SplitVariableDeclarations(VariableDeclaratorSyntax declarator, NodesVisitor nodesVisitor, SemanticModel semanticModel)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.MethodBodyVisitor.VisitLocalDeclarationStatement(LocalDeclarationStatementSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.LocalDeclarationStatementSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.<>c__DisplayClass28_0.<VisitMethodBlock>b__1(StatementSyntax s)
   at System.Linq.Enumerable.<SelectManyIterator>d__17`2.MoveNext()
   at Microsoft.CodeAnalysis.SyntaxList`1.CreateNode(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.Block(IEnumerable`1 statements)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitMethodBlock(MethodBlockSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.MethodBlockSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.<ConvertMembers>b__15_0(StatementSyntax m)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.<ConvertMembers>d__15.MoveNext()
   at Microsoft.CodeAnalysis.SyntaxList`1.CreateNode(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.SyntaxList`1..ctor(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.List[TNode](IEnumerable`1 nodes)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitClassBlock(ClassBlockSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.ClassBlockSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.<VisitCompilationUnit>b__12_1(StatementSyntax m)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at Microsoft.CodeAnalysis.SyntaxList`1.CreateNode(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.SyntaxList`1..ctor(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.List[TNode](IEnumerable`1 nodes)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.NodesVisitor.VisitCompilationUnit(CompilationUnitSyntax node)
   at Microsoft.CodeAnalysis.VisualBasic.Syntax.CompilationUnitSyntax.Accept[TResult](VisualBasicSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.Convert(VisualBasicSyntaxNode input, SemanticModel semanticModel, Document targetDocument)
   at ICSharpCode.CodeConverter.CSharp.VisualBasicConverter.ConvertText(String text, MetadataReference[] references)

[GrahamTheCoder]

Thanks for the bug report - I'll try to have a look next week