Getting node from line number in Roslyn

Question

How can I get a SyntaxNode based on a line number? Else if its possible to get LineSpan of that line number then to node.

Answer 1

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.Text;

var s =  @"class M
{
    public void P() { }
}";
var text = SourceText.From(s);
var lineIndex = 2;
var lineSpan = text.Lines[lineIndex].Span;
var tree = SyntaxFactory.ParseSyntaxTree(text);
var node = tree.GetRoot().FindNode(lineSpan);
// or if you want a all nodes related to the span
var node = tree.GetRoot().DescendantNodesAndSelf(lineSpan);