C#

   CSharpCodeProvider codeProvider = new CSharpCodeProvider();<br />
   ICodeCompiler icc = codeProvider.CreateCompiler();<br />
<br />
   System.CodeDom.Compiler.CompilerParameters parameters = new<br />
CompilerParameters();<br />
   parameters.GenerateExecutable = false;<br />
   parameters.GenerateInMemory = true;<br />
   CompilerResults results = icc.CompileAssemblyFromSource(parameters,<br />
txtSource );<br />
<br />
   if (results.Errors.Count > 0)<br />
   {<br />
    foreach(CompilerError CompErr in results.Errors)<br />
    {<br />
     txtErr.Text += "Line number " + CompErr.Line +<br />
      ", Error Number: " + CompErr.ErrorNumber +<br />
      ", '" + CompErr.ErrorText + ";" +<br />
      Environment.NewLine + Environment.NewLine;<br />
    }<br />
   }<br />
   else<br />
   {<br />
<br />
    Assembly   assembly = results.CompiledAssembly;<br />
    Type   t = assembly.GetType("MyNamespace.MyClass");<br />
<br />
    MethodInfo me = t.GetMethod("MyMethod");<br />
<br />
    object result;<br />
    result = t.InvokeMember("MyMethod2", BindingFlags.Public |<br />
BindingFlags.Static | BindingFlags.InvokeMethod ,<br />
      null, null, null );<br />
    MessageBox.Show ( ((int)result).ToString() ); // get the result as<br />
string<br />
<br />
   }<br />
  } //(provided by Wiktor Zychla)