Test Roslyn Scripting API. It's cool!

CSharpScriptingTest.cs

using System;
using System.Linq.Expressions;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Scripting;
using Microsoft.CodeAnalysis.Scripting.CSharp;
using static System.Console;

namespace CSharpScriptingTest
{
    class Program
    {
        static void Main(string[] args)
        {
            TestScripting().Wait();
        }

        static async Task TestScripting()
        {
            var options = ScriptOptions.Default.WithReferences("System.Core");
            var expr = await CSharpScript.EvaluateAsync<Expression<Func<double, double>>>("t => t == 0 ? 34 : t + 1", options);
            var f = expr.Compile();

            WriteLine($"f = {expr.ToString()}");
            WriteLine($"f(0) = {f(0)}");
            WriteLine($"f(1) = {f(1)}");
        }
    }
}