System.Runtime.Emit namespace provides necessary classes to create an executable (.EXE) file on-the-fly.
After compiling this code sample and run it on the Console. A new file is generated in your folder called TestAsm.exe. This EXE file print's a message "Hello World" on the Console.
using System;
using System.Runtime;
using System.Runtime.Emit;
class RuntimeEmit
{
public static void Main(String [] args)
{
AppDomain ad = AppDomain.CurrentDomain;
AssemblyName am = new AssemblyName();
am.Name = "TestAsm";
AssemblyBuilder ab = ad.DefineDynamicAssembly(am,AssemblyBuilderAccess.Save);
ModuleBuilder mb = ab.DefineDynamicModule("testmod","TestAsm.exe");
TypeBuilder tb = mb.DefineType("mytype",TypeAttributes.Public);
MethodBuilder metb = tb.DefineMethod("hi",MethodAttributes.Public | MethodAttributes.Static,null,null);
mb.SetEntryPoint(metb);
ILGenerator il = metb.GetILGenerator();
il.EmitWriteLine("Hello World");
il.Emit(OpCodes.Ret);
tb.CreateType();
ab.Save("TestAsm.exe");
}
}
- Save this file as RuntimeEmit.cs and
- Compile C:/>csc RuntimeEmit.cs
- Run this file C:\>RuntimeEmit
- To run the Exe file generated, here is the command
C:\>TestAsm
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