Compile and run dynamic code, without generating EXE?

Question

I was wondering if it was possible to compile, and run stored code, without generating an exe or any type of other files, basically run the file from memory.

Basical

Answer 1

using (Microsoft.CSharp.CSharpCodeProvider foo = 
           new Microsoft.CSharp.CSharpCodeProvider())
{
    var res = foo.CompileAssemblyFromSource(
        new System.CodeDom.Compiler.CompilerParameters() 
        {  
            GenerateInMemory = true 
        }, 
        "public class FooClass { public string Execute() { return \"output!\";}}"
    );

    var type = res.CompiledAssembly.GetType("FooClass");

    var obj = Activator.CreateInstance(type);

    var output = type.GetMethod("Execute").Invoke(obj, new object[] { });
}

This compiles a simple class from the source code string included, then instantiates the class and reflectively invokes a function on it.