如何从c#头文件中提取自动补全功能的函数原型

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using System.Collections.Generic;
using System.Linq;

public class FunctionPrototypeExtractor
{
    public static List<string> ExtractFunctionPrototypes(string csCode)
    {
        var tree = CSharpSyntaxTree.ParseText(csCode);
        var root = tree.GetRoot();
        var functionPrototypes = new List<string>();

        foreach (var methodDeclaration in root.DescendantNodes().OfType<MethodDeclarationSyntax>())
        {
            var prototype = $"{methodDeclaration.ReturnType} {methodDeclaration.Identifier}({string.Join(", ", methodDeclaration.ParameterList.Parameters.Select(p => $"{p.Type} {p.Identifier}"))});";
            functionPrototypes.Add(prototype);
        }

        return functionPrototypes;
    }
}

// 示例用法
string csCode = @"
public class Example
{
    public int Add(int a, int b) { return a + b; }
    public void Print(string message) { Console.WriteLine(message); }
}";

var prototypes = FunctionPrototypeExtractor.ExtractFunctionPrototypes(csCode);
foreach (var prototype in prototypes)
{
    Console.WriteLine(prototype);
}