使用Roslyn替换C#中的标识符

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;

public class IdentifierReplacer : CSharpSyntaxRewriter
{
    private readonly string _oldIdentifier;
    private readonly string _newIdentifier;

    public IdentifierReplacer(string oldIdentifier, string newIdentifier)
    {
        _oldIdentifier = oldIdentifier;
        _newIdentifier = newIdentifier;
    }

    public override SyntaxNode VisitIdentifierName(IdentifierNameSyntax node)
    {
        if (node.Identifier.ValueText == _oldIdentifier)
        {
            return node.WithIdentifier(SyntaxFactory.Identifier(_newIdentifier));
        }

        return base.VisitIdentifierName(node);
    }
}

public class Program
{
    public static void Main()
    {
        string code = @"
            using System;

            public class MyClass
            {
                public void MyMethod()
                {
                    int myVariable = 10;
                    Console.WriteLine(myVariable);
                }
            }
        ";

        SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(code);

        IdentifierReplacer replacer = new IdentifierReplacer("myVariable", "newVariable");
        SyntaxNode newSyntaxTree = replacer.Visit(syntaxTree.GetRoot());

        string newCode = newSyntaxTree.ToString();
        Console.WriteLine(newCode);
    }
}