Not all InvocationExpression are rewritten - .net-core

Question

I want to rewrite all InvocationExpression of "MyMethod" in a SyntaxTree to add a literal param 0 with
private class Rewriter : CSharpSyntaxRewriter
{
public int Id { get; set; }
public override SyntaxNode VisitInvocationExpression(InvocationExpressionSyntax node)
{
var invokName = node.Expression.ToString();
if (invokName == "MyMethod")
{
var argus = node.ArgumentList.AddArguments(
SyntaxFactory.Argument(SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(Id))));
return node.Update((ExpressionSyntax)Visit(node.Expression), argus);
}
return node;
}
}
static void Main(string[] args)
{
SyntaxTree oriTree = CSharpSyntaxTree.ParseText(#"
public class MyClass
{
public string MyMethod(int id)
{
return $""{id}"";
}
public void Say()
{
var tmp = MyMethod();//worked
var tmp1 = MyMethod();//worked
var tmp2 = ""Hi "" + MyMethod();//worked
Console.WriteLine($""Say {MyMethod()}"");//Not worked
Console.WriteLine(""Hello "" + MyMethod());//Not worked
}
}");
var syntaxRoot = oriTree.GetCompilationUnitRoot();
var visitor = new Rewriter();
visitor.Id = 0;
var changedSyntaxTree = visitor.Visit(syntaxRoot).SyntaxTree;
}
But not all are rewritten.
With
var methods = syntaxRoot.DescendantNodes().OfType<InvocationExpressionSyntax>().Where(o => o.Expression.ToString() == "MyMethod");
I can enumerate all InvocationExpression of "MyMethod". But I don't know how to change syntax tree without CSharpSyntaxRewriter.
How can I do it? Thanks.

Answer 1

It Solved based on CyrusNajmabadi's reply
you need to do this instead:
public override SyntaxNode VisitInvocationExpression(InvocationExpressionSyntax node)
{
node = (InvocationExpressionSyntax)base.VisitInvocationExpression(node);
// now, the rest of your code:
var invokName = node.Expression.ToString();
// etc.
Thanks CyrusNajmabadi!