Simple F# TypeProvider code cannot run in LINQPad

sdflysha

Say I have code like this and with nuget package FSharp.Data installed:

open FSharp.Data

[<Literal>]
let path = @"https://www.linqpad.net"
type QueryHtml = HtmlProvider<path>
let html = QueryHtml.Load(path)

This code run perfectly fine with Visual Studio, but when I run it in latest LINQPad(5.37.00), it will throws a MissingMethodException:

MissingMethodException:
Failed to find method:“Microsoft.FSharp.Control.FSharpAsync`1<System.IO.TextReader> FSharp.Data.Runtime.IO.asyncReadTextAtRuntime(Boolean, System.String, System.String, System.String, System.String, System.String)”。

I switched both "Always use built-in F# compiler" On/Off, and switched both FSharp.Data version 3.0/2.x, both throw this exception. Is there any reason or any solution for this?

sdflysha

Is there any explaination or solution?

MicM

Hi, was getting the same error, and adding FSharp.Core 4.6 using linqpad nuget fixed it, if you check your visual studio project there is a very good chance that the project also has FSharp.Core

sdflysha

Thanks, install FSharp.Core nuget package fixed it.