VisitClassDeclaration node.Identifier in Roslyn

Question

How can I find what line number in the source file the declaration was found on?

Answer 1

Disclaimer: I work for Microsoft on the Roslyn team.

You can use the ISyntaxTree.GetLineSpan() method to convert to a line number. For example, given an ISymbol "symbol", you can get the start location of the first definition with:

var loc = symbol.Locations.First();
var lineSpan = loc.SourceTree.GetLineSpan(loc.SourceSpan, 
    usePreprocessorDirectives: false);
var line = lineSpan.StartLinePosition.Line;
var character = lineSpan.StartLinePosition.Character;

From the title, it looks like you're starting with a SyntaxNode, so you can just use the Span property directly.