Call a higher order F# function from C#

Question

Given the F# higher order function (taking a function in parameter):

let ApplyOn2 (f:int->int) = f(2)  

and the C# function

Answer 1

To get an FSharpFunc from the equivalent C# function use:

Func cs_func = (i) => ++i;
var fsharp_func = Microsoft.FSharp.Core.FSharpFunc.FromConverter(
    new Converter(cs_func));

To get a C# function from the equivalent FSharpFunc, use

var cs_func = Microsoft.FSharp.Core.FSharpFunc.ToConverter(fsharp_func);
int i = cs_func(2);

So, this particular case, your code might look like:

Func cs_func = (int i) => ++i;
int result = ApplyOn22(Microsoft.FSharp.Core.FSharpFunc.FromConverter(
            new Converter(cs_func)));