Introduction to IL Assembly Language

//MyForm.il
//Shows how to create a container and play with it's properties

.assembly extern mscorlib
{
  .ver 1:0:3300:0
}
.assembly extern System
{
  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         
  .ver 1:0:3300:0
}
.assembly extern System.Drawing
{
  .publickeytoken = (B0 3F 5F 7F 11 D5 0A 3A )                         
  .ver 1:0:3300:0
}
.assembly extern System.Windows.Forms
{
  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         
  .ver 1:0:3300:0
}
.assembly MyForm
{
  .ver 1:0:1:0
}
.module MyForm.exe

.namespace MyForm
{
  .class public TestForm extends [System.Windows.Forms]System.Windows.Forms.Form
  {
    .field private class [System]System.ComponentModel.IContainer components
    .method public static void Main() cil managed
    {
      .entrypoint
      .maxstack  1
            
      //Create New Object of TestForm Class and Call the Constructor     
      newobj     instance void MyForm.TestForm::.ctor()
      call       void [System.Windows.Forms]System.Windows.Forms.Application::Run(class [System.Windows.Forms]System.Windows.Forms.Form)
      ret
    }

    .method public specialname rtspecialname instance void  .ctor() cil managed
    {
     
      .maxstack  4
      
      ldarg.0
     //Call Base Class Constructor
      call       instance void [System.Windows.Forms]System.Windows.Forms.Form::.ctor()
      
      //Initialize the Components
      ldarg.0
      newobj     instance void [System]System.ComponentModel.Container::.ctor()
      stfld      class [System]System.ComponentModel.IContainer MyForm.TestForm::components

	  //Set the Title of the Window (Form)
      ldarg.0
      ldstr      "This is the Title of the Form...."
      call   instance void [System.Windows.Forms]System.Windows.Forms.Control::set_Text(string)
      
      //Set the Back Color of the Form
      ldarg.0
      ldc.i4 0xff
      ldc.i4 0
      ldc.i4 0
      call valuetype [System.Drawing]System.Drawing.Color [System.Drawing]System.Drawing.Color::FromArgb(int32, int32, int32)
      call   instance void [System.Windows.Forms]System.Windows.Forms.Control::set_BackColor(valuetype [System.Drawing]System.Drawing.Color)
      
      
      //Maximize the Form using WindowState Property (set_WindowState method in IL)
      ldarg.0
      ldc.i4 2		//2 for Maximize
      call instance void [System.Windows.Forms]System.Windows.Forms.Form::set_WindowState(valuetype [System.Windows.Forms]System.Windows.Forms.FormWindowState)
      ret
    }

    .method family virtual instance void Dispose(bool disposing) cil managed
    {
      .maxstack  2

      ldarg.0
      ldfld      class [System]System.ComponentModel.IContainer MyForm.TestForm::components
      callvirt   instance void [mscorlib]System.IDisposable::Dispose()
		
		//Call Base Class's Dispose Event
      ldarg.0
      ldarg.1
      call       instance void [System.Windows.Forms]System.Windows.Forms.Form::Dispose(bool)
      ret
    }
  } 
}