Executing some script docs is outdated

[MikeAlhayek]

The example in the docs on how to evaluate code on this page seems to be outdated or does not work.

The example shows this way is to get current date using script.

var scriptingManager = serviceProvider.GetService<IScriptingManager>();
var date = scriptingManager.Evaluate("js: new Date().toISOString()");

However, the IScriptingManager does not expose a method that accepts string only.

Maybe the example should be as follow? Not sure if there is an easier way.

var scriptingManager = serviceProvider.GetService<IScriptingManager>();
var engine = scriptingManager.GetScriptingEngine("js");
var scope = engine.CreateScope(_scriptingManager.GlobalMethodProviders.SelectMany(x => x.GetMethods()), serviceProvider, null, null);
var date = engine.Evaluate("js: new Date().toISOString()");

Also it may be helpful to explain how to evaluate parameters using code? For example, how can I get the AdminUsername?

Executing engine.Evaluate(scope, "js: parameters('AdminUsername')" throws an exception `parameters is not defined. I added the following code to get it to work. Not sure if this is the right/best way to do it

var engine = _scriptingManager.GetScriptingEngine("js");
var methodProviders = _scriptingManager.GlobalMethodProviders.SelectMany(x => x.GetMethods()).ToList();
var environment = new Dictionary<string, object>();
await _environmentProviders.OrderBy(x => x.Order).InvokeAsync((provider, env) => provider.PopulateEnvironmentAsync(env), environment, _logger);

 methodProviders.AddRange(new ParametersMethodProvider(environment).GetMethods());

 var scope = engine.CreateScope(methodProviders, _serviceProvider, null, null);

var adminId = engine.Evaluate(scope, "js: parameters('AdminUserId')");
var adminName = engine.Evaluate(scope, "js: parameters('AdminUsername')");

[hishamco]

Could you please submit a PR to make it up to date?