Ive been noticing that both Action and Func delegates , having the specific structure

Question

Editorial Team

Asked: June 3, 20262026-06-03T20:32:26+00:00 2026-06-03T20:32:26+00:00

Ive been noticing that both Action and Func delegates , having the specific structure from 2 to 8 params :

enter image description here

why did they open – explicit counted – parameter types ? ( and if so , why 8?)

what about if i have 10 params ?

edit

dis-continuing the 8 tradition ,
tuple has 7 … ??

enter image description here

in the SystemCore.Dll – there are the 1..16 params ver.

You must login to add an answer.

Need An Account,

Editorial Team · Answer 1 · 2026-06-03T20:32:27+00:00

Editorial Team

> why did they open – explicit counted – parameter types ?

Because the language does not support a variable amount of Type parameters.

> ( and if so , why 8?)

Because 4 should usually be enough.

> what about if i have 10 params ?

Then you will have to add the following to your own code:

 delegate void Action<T1, T2, ... , T10> (T1 arg1, T2 arg2, ..., T10 arg10);