static void Main (string[] args){    var x = 2;    var y = 2;    if (1 == 0) ;    {        ++x;    }    Console.WriteLine (x + y);}

static void Main(string[] args){    using (var p = new CSharpCodePRovider())    {        Console.SetOut((TextWriter)p.CompileAssemblyFromSource(new CompilerParameters() { GenerateExecutable = false, GenerateInMemory = true, IncludeDebugInformation = false }, "using System.IO;using System.Text;class a:TextWriter{TextWriter _;public a(TextWriter w){_=w;}public override void Write(char v){_.Write(v=='4'?'5':v);} public override Encoding Encoding{get{return _.Encoding;}}}").CompiledAssembly.GetTypes()[0].GetConstructor(new[] { typeof(TextWriter) }).Invoke(new object[] { Console.Out }));    }    Console.WriteLine("{0}+{1}={2}", 2, 2, 2 + 2);}