.NET Standard 2.1
dotnet add package IOptionsWriter --version
NuGet\Install-Package IOptionsWriter -Version
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="IOptionsWriter" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add IOptionsWriter --version
#r "nuget: IOptionsWriter,"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install IOptionsWriter as a Cake Addin
#addin nuget:?package=IOptionsWriter&version=

// Install IOptionsWriter as a Cake Tool
#tool nuget:?package=IOptionsWriter&version=


Easy way to write appsettings.json or other configuration json file

How to use


Nuget Package Manager Console:
Install-Package IOptionsWriter
.Net CLI:
dotnet add package IOptionsWriter


IServiceCollection.ConfigureWritable<TOptions>(string sectionName = null, string settingsFile = "appsettings.json", bool reloadAfterWrite = false)

TOptions - type of your settings

sectionName - your configuration section name(default: TOptions type name)

settingsFile - default appsettings.json

reloadAfterWrite - you can enable this option if you have problems detecting file changes or if add the settings file with false value of reloadOnChange parameter (builder.AddJsonFile(appsettings.json, optional: false, reloadOnChange: false);)

Simple sample


    "MySettings": {
        "MyOption": "MyValue"


public void ConfigureServices(IServiceCollection services)


public class MyController : Controller {
    private readonly IOptionsWritable<MySettings> _myOptionsAccessor;

    public MyController(IOptionsWritable<MySettings> myOptionsAccessor) {
        _myOptionsAccessor = myOptionsAccessor;

    public IActionResult SetMyOptionValue(string value) {
        _myOptionsAccessor.Update(options => options.MyOption = value);

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated 22,773 12/10/2019
4.7.0 442 12/10/2019
0.1.2 1,667 2/5/2019
0.1.1 900 11/23/2018
0.1.0 690 11/23/2018
0.0.3 627 11/23/2018
0.0.2 697 11/22/2018
0.0.1 670 11/13/2018

Easy way to write appsettings.json or other configuration json file