Load a configuration source from a JSON string in F#

JsonConfigSource.fs

open Microsoft.Extensions.Configuration

/// Builds a configuration source from raw JSON.
let configSourceFromJson (json:string) : IConfigurationSource =
    { new IConfigurationSource with
            member this.Build (builder:IConfigurationBuilder) =
                { new ConfigurationProvider() with
                    member this.Load() =
                        this.Data <- Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string,string>> json
                } :> IConfigurationProvider
    }