如何动态评估C#表达式？

using System;
using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.Scripting;

class Program
{
    static async System.Threading.Tasks.Task Main(string[] args)
    {
        string expression = "2 + 3";
        var scriptOptions = ScriptOptions.Default.WithImports("System");
        var script = CSharpScript.Create<int>(expression, scriptOptions);
        var compilation = await script.CompileAsync();
        if (compilation.Success)
        {
            var state = await script.RunAsync();
            Console.WriteLine($"Result: {state.ReturnValue}");
        }
        else
        {
            Console.WriteLine("Error:");
            foreach (var diagnostic in compilation.Diagnostics)
            {
                Console.WriteLine($"  {diagnostic.GetMessage()}");
            }
        }
    }
}