The DynamicILInfo class allows developers to write their own MSIL generators instead of using ILGenerator.
To create instances of other types, call methods, and so on, the MSIL you generate must include tokens for those entities. The DynamicILInfo class provides several overloads of the GetTokenFor method, which return tokens valid in the scope of the current DynamicILInfo. For example, if you need to call an overload of the Console..::.WriteLine method, you can obtain a RuntimeMethodHandle for that overload and pass it to the GetTokenFor method to obtain a token to embed in your MSIL.
Once you have created Byte arrays for your local variable signature, exceptions, and code body, you can use the SetCode, SetExceptions, and SetLocalSignature methods to insert them into the DynamicMethod associated with your DynamicILInfo object.
Generating your own metadata and MSIL requires familiarity with the Common Language Infrastructure (CLI) documentation, especially "Partition II: Metadata Definition and Semantics" and "Partition III: CIL Instruction Set". The documentation is available online; see ECMA C# and Common Language Infrastructure Standards on MSDN and Standard ECMA-335 - Common Language Infrastructure (CLI) on the Ecma International Web site.