Unhandled Exception-Method not found: ..LiteRepository.Insert... at ...FSharp.Extensions.LiteRepository.insertItem...

Continuing with my first steps, I find that I still need to include some module. I get the following error addressed from the following line: LiteRepository.insertItem eorder

Unhandled Exception: System.MissingMethodException: Method not found: 'Void LiteDB.LiteRepository.Insert(System.__Canon, System.String)'.
   at LiteDB.FSharp.Extensions.LiteRepository.insertItem[a](a item, LiteRepository lr)
   at Program.main(String[] argv) in /app/appbook/Program.fs:line 248

    let eorder = { Id = 1; Items = [item1;item2];  OrderNumRange = "" }

    let queryedEOrder =
        db 
        |> LiteRepository.insertItem eorder
        |> LiteRepository.query<EOrder> 
        |> LiteQueryable.first

    match queryedEOrder.Items with 
    | [item1;item2] -> 
        match item1,item2 with 
        | :? IBarcode,:? IColor -> 
            pass()
        | _ -> fail()   
    | _ -> fail()
  
    printfn "Hello World from F#!"
    0 // return an integer exit code

[srlopez]

Confirmed & Thanks! Removing <PackageReference Include="LiteDB" Version="4.1.4" /> from app.fsproj and dotnet restore && dotnet run print passed! on the screen:

dotnet restore && dotnet run
  Restore completed in 3.95 sec for /app/appbook.fsproj.
passed
Hello World from F#!

Thanks

[Zaid-Ajaj]

Found it, you are using incompatible versions of LiteDB and LiteDB.FSharp:

<PackageReference Include="LiteDB" Version="4.1.4" />
<PackageReference Include="LiteDB.FSharp" Version="2.7.0" />

The fix is to remove <PackageReference Include="LiteDB" Version="4.1.4" /> from your package references and run dotnet restore && dotnet run because the right version will be pulled in a dependency of LiteDB.FSharp, so your project file will look something like:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Compile Include="Program.fs" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="LiteDB.FSharp" Version="2.7.0" />
  </ItemGroup>

</Project>

Can you please confirm the fix when you remove the LiteDB package reference and run dotnet restore && dotnet run, I will close the issue for now, please re-open if the problem persists.