CODEWITHSUNDEEP
f#
Thomas
Thomas

Reputation: 12137

Passing a list from C# to F#, how to specify the parameter is a list?

With the following C# code

var MyList = new List<MyClass>();
SomeFSharpFunc(MyList);

on the F# side:

let SomeFSharpFunc (MyList: ???What do I put here so I know it's a list) =

I don't know to how express that the incoming parameter is a list.

Also, do I need to duplicate the C# class as a F# type?

Upvotes: 1

Views: 122

Answers (1)

Alexey Romanov
Alexey Romanov

Reputation: 170919

You can just use 

open System

let SomeFSharpFunc (MyList: System.Collections.Generic.List<MyClass>) = ...

but you should consider using seq<MyClass> instead (which is equivalent to IEnumerable<MyClass>) if you don't need full power of System.Collections.Generic.List, especially since in F# "list" generally refers to a very different data structure.

See also Converting between C# List and F# List.

Also, do I need to duplicate the C# class as a F# type?

No.

Upvotes: 4

Related Questions