In general, how to convert ilasm syntax into Reflection.Emit calls?

Question

I am writing a special-purpose mini-compiler and I often view disassembled CIL to figure out how to do things. But it's often not obvious how to translate the disassembled code to Reflection.Emit calls. Does a reference manual exist or any other source of information for doing this translation?

Edit: yes, mapping the opcodes to ILGenerator is pretty straightforward; I'm talking about all the other stuff like the .directives and attributes. For instance, how do you find out how to write the Reflection.Emit equivalent of something like Dictionary<TKey,TValue>?

.class public auto ansi serializable beforefieldinit Dictionary<TKey, TValue>
    extends System.Object
    implements System.Collections.Generic.IDictionary`2<!TKey, !TValue>,
    System.Collections.Generic.ICollection`1<valuetype 
        System.Collections.Generic.KeyValuePair`2<!TKey, !TValue>>, 
    ...
{
    .custom instance void System.Diagnostics.DebuggerDisplayAttribute::
        .ctor(string) = { string('Count = {Count}') }

    .method public hidebysig newslot virtual final instance bool TryGetValue
        (!TKey key, [out] !TValue& 'value') cil managed
    {
        .maxstack 3
        .locals init ([0] int32 num)
        ...

Or how about the "param" directive?

// public static void SayHello(string s = "Hello World!")
.method public hidebysig static void SayHello([opt] string s) cil managed
{
    .param [1] = "Hello World!"

Answer 1

Since no one could answer the question, I conclude no documentation exists to show the relationship between ilasm syntax and Reflection.Emit calls.

As a side note, I've found that it's usually better to create code at run-time using RunSharp than Reflection.Emit. When I have time I'll try to figure out the new version of Cecil.