Sometimes I try to write a little bit of IL code or modify bits and pieces here and there (specially modify IL generated from say C# code).

The problem is writing up the complete IL that compiles into an exe is a pain (specially because my usage is to tweak them). To work around this I use the following flow which I thought I'd share

1. Write C# code that meets the need
2. Build it
3. Disassemble the exe by using the following command
   ildasm /out=file.il My.exe 
4. Tweak the IL inside the file.il file
5. Assemble it back again with
   ilasm file.il

the neat part is the /out parameter which makes ildasm dump a single IL for the entire code. At the beginning I used to try patching the code up by copy-pasting from ILDASM UI which show separate IL code for every method :(