Missing method exception on .NET 5 preview

[kerams]

I've encountered a runtime error in a simple console application using FSharp.Data. The error message is the same as in fsprojects/FSharp.Data#605

Repro steps

• Install the 5.0.100-preview.1.20155.7 SDK.
• dotnet run a netcoreapp3.1 project that uses the Load method of the HTML type provider (I assume this is all it takes - if not, I can provide a better repro)

Expected behavior

No exception.

Actual behavior

Unhandled exception. System.MissingMethodException: Method not found: 'Microsoft.FSharp.Control.FSharpAsync`1<System.IO.TextReader> FSharp.Data.Runtime.IO.asyncReadTextAtRuntime(System.Boolean, System.String, System.String, System.String, System.String, System.String)'

Known workarounds

Use an older SDK version with global.json:

{
  "sdk": {
    "version": "3.1.100"
  }
}

However, this does not help with progams built from within VS 16.6 Preview 1 as they fail at runtime regardless.

Related information

Provide any related information (optional):

• Windows 10
• SDK: 5.0.100-preview.1.20155.7 and 3.1.101
• VS 16.6 Preview 1

[cartermp]

This doesn't require targeting .NET Core 3.1.x, so there's an issue here specifically with .NET 5:

1. Get the .NET 5 SDK (latest preview)
2. dotnet new console -lang F# -o fsdatatest
3. cd fsdatatest && dotnet add package fsharp.data

// Learn more about F# at http://fsharp.org

open System
open FSharp.Data

[<Literal>]
let url =  @"https://en.wikipedia.org/wiki/2017_FIA_Formula_One_World_Championship"

type F1_2017 = HtmlProvider<url>

// Download the latest market depth information
let f1Calendar = 
    F1_2017.Load(url).Tables.``Season calendar``

[<EntryPoint>]
let main argv =
    for row in f1Calendar.Rows do
        printfn "%A" row.``Grand Prix``
    0 // return an integer exit code

5. dotnet run

λ ~/scratch/fsdatatest/ dotnet run
Unhandled exception. System.TypeInitializationException: The type initializer for 'Program' threw an exception.
 ---> System.TypeInitializationException: The type initializer for '<StartupCode$fsdatatest>.$Program' threw an exception.
 ---> System.MissingMethodException: Method not found: 'Microsoft.FSharp.Control.FSharpAsync`1<System.IO.TextReader> FSharp.Data.Runtime.IO.asyncReadTextAtRuntime(System.Boolean, System.String, System.String, System.String, System.String, System.String)'.
   --- End of inner exception stack trace ---
   at Program..cctor()
   --- End of inner exception stack trace ---
   at Program.main(String[] argv) in /Users/phillip/scratch/fsdatatest/Program.fs:line 17

[cartermp]

Also linking #8881 #8913

[cartermp]

Fixed by #8963