COMPILATION ET RÉFLECTION

using System;
using System.CodeDom.Compiler;
using System.Reflection;
using System.Text;

namespace cscomp
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            // Code source a compiler
            StringBuilder oSource = new StringBuilder();
            oSource
            .AppendLine("using System.Windows.Forms;")
            .AppendLine("namespace nsTest")
            .AppendLine("{")
            .AppendLine(" public static class Program")
            .AppendLine(" {")
            .AppendLine("  public static void Main()")
            .AppendLine("  {")
            .AppendLine("   MessageBox.Show(\"Hello !!\");")
            .AppendLine("  }")
            .AppendLine("  public static void Test(object args)")
            .AppendLine("  {")
            .AppendLine("   MessageBox.Show(\"Test :'\" + args.ToString() + \"'\");")
            .AppendLine("  }")
            .AppendLine(" }")
            .AppendLine("}");
            
            // Instanciation du compilateur et des ses paramètres
            CodeDomProvider oCodeProvider = new Microsoft.CSharp.CSharpCodeProvider();
            CompilerParameters oCompPrms = new CompilerParameters();

            // Définition des références
            oCompPrms.ReferencedAssemblies.Add("System.dll");
            oCompPrms.ReferencedAssemblies.Add("System.Windows.Forms.dll");
            
            // Paramètres non utilisé
            //oCompPrms.EmbeddedResources.Clear();
            //oCompPrms.LinkedResources.Clear();
            //oCompPrms.TempFiles.Clear(); 
            //oCompPrms.UserToken = new IntPtr(0);
            //oCompPrms.Win32Resource = "";
            //oCompPrms.OutputAssembly = "nsTest";
            //oCompPrms.CompilerOptions  = string.Empty;
            //oCompPrms.Evidence = null;
            
            //  Définition des paramètres de compilation
            oCompPrms.GenerateExecutable = true;
            oCompPrms.GenerateInMemory = true;
            oCompPrms.IncludeDebugInformation = false;
            oCompPrms.TreatWarningsAsErrors  = true;
            oCompPrms.MainClass = "nsTest.Program";
            oCompPrms.WarningLevel = 3;

            // Compilation du code
            CompilerResults oCompResults 
                = oCodeProvider.CompileAssemblyFromSource
                (oCompPrms, new string[] { oSource.ToString() });

            //  Si compilation réussie
            if (oCompResults.NativeCompilerReturnValue == 0)
            {
                // Lecture de l'assembly compilé
                Assembly oAssembly = oCompResults.CompiledAssembly;
    
                // Invocation du point d'entrée (Main)
                object oRunResult = oAssembly.EntryPoint.Invoke(null, null);
                
                // Invocation de la méthode test
                Type oType = oAssembly.GetType("nsTest.Program");
                MethodInfo oMethod = oType.GetMethod("Test", new Type[]{ typeof(object) });
                oMethod.Invoke(null, new object[] { "toto" });
            }

            // Si erreur de compilation
            else
            {
                // Affichage des erreurs
                foreach (CompilerError oCompError in oCompResults.Errors)
                {
                    string sCompError = string.Format
                    (
                        "{0} (l:{1},c:{2}) '{3}' ({4}):{5}",
                        (oCompError.IsWarning) ? "warning" : "error",
                        oCompError.Line.ToString(), oCompError.Column.ToString(),
                        oCompError.FileName,
                        oCompError.ErrorNumber, oCompError.ErrorText
                    );
                    System.Diagnostics.Debug.WriteLine(sCompError);
                }
            }

        }

    }

}