How to create a Roslyn ITypeSymbol for an arbitrary type?

Question

I can use a SyntaxGenerator to generate a parameter of type Int32 like so...

var generator = SyntaxGenerator.GetGenerator(document);
var paramType = generator.TypeExpression(SpecialType.System_Int32);
var param = generator.ParameterDeclaration("MyParam", paramType);

What equivalent code should I use to create a parameter of type Dataset ?

I presume I need to create an ITypeSymbol to pass to the generator.TypeExpression , but how to do this?

Answer 1

If you have access to a Compilation , you can use GetTypeByMetadataName , as explained in this blog post and this SO answer :

var dataSetType = compilation.GetTypeByMetadataName("System.Data.DataSet");
var paramType = generator.TypeExpression(dataSetType);
var param = generator.ParameterDeclaration("MyParam", paramType);