namespace UiPath.Studio.Activities.Api
{
    /// <summary>
    /// Supported Studio feature keys.
    /// </summary>
    public static class DesignFeatureKeys
    {
        /// <summary>
        /// Studio 19.8
        /// </summary>
        public const string Settings = nameof(Settings) + "V1";

        /// <summary>
        /// Studio 19.8
        /// </summary>
        public const string Theme = nameof(Theme) + "V1";

        /// <summary>
        /// Studio 19.8
        /// </summary>
        public const string Wizards = nameof(Wizards) + "V1";

        /// <summary>
        /// Studio 19.8
        /// </summary>
        public const string AccessProvider = nameof(AccessProvider) + "V1";

        /// <summary>
        /// Studio 19.10
        /// </summary>
        public const string Telemetry = nameof(Telemetry) + "V1";
    }
}

IWorkflowDesignApi studioActivitiesApi;
            // How to check for a feature.
            if (studioActivitiesApi.HasFeature(UiPath.Studio.Activities.Api.DesignFeatureKeys.Settings))
            {
                // Call Method or lambda that is using specific feature
                // This ensures that the code is JIT compiled only after the feature check
           }

using UiPath.Studio.Activities.Api;
using UiPath.Studio.Activities.Api.Settings;

namespace MyCustomActivityPack
{
    public static class SettingsCreator
    {
        // This is the key used to reference a tab, even across packages.
        internal const string CategoryKey = "DemoTabUniqueKey";

        // This is the key used to reference the setting, even across packages.
        internal const string CommentTextKey = CategoryKey + ".Comment";

        internal const string PresetKey = CategoryKey + ".Preset";

        internal const string ShuffleKey = CategoryKey + ".Shuffle";

        public static void CreateSettings(IWorkflowDesignApi workflowDesignApi)
        {
            var settingsApi = workflowDesignApi.Settings;

            // Add the category (a tab in the settings page)
            var category = new SettingsCategory()
            {
                Description = "Settings Sample",
                Header = "Settings Sample",
                Key = CategoryKey
            };

            settingsApi.AddCategory(category);
            AddMusicPlayerSection(settingsApi, category);
            AddMiscSettings(settingsApi, category);

private static SettingsSection AddMusicPlayerSection(IActivitiesSettingsService settingsApi, SettingsCategory category)
        {
            var section = new SettingsSection()
            {
                Description = "Settings for a music player",
                IsExpanded = true, //set this to control default expansion
                Title = "Music Player Settings",
                // the key of a section has to be unique only within the category
                Key = "Player"
            };
            settingsApi.AddSection(category, section);

            AddSimpleBoolean(settingsApi, section);
            AddSingleChoice(settingsApi, section);
            return section;
        }

private static void AddSimpleBoolean(IActivitiesSettingsService settingsApi, SettingsSection section)
        {
            var booleanSetting = new SingleValueEditorDescription<bool>
            {
                DefaultValue = true,
                Description = "If active, the playlist is shuffled",
                // The value returned by GetDisplayValue should be localized
                GetDisplayValue = b => b ? "On" : "Off",
                Key = ShuffleKey,
                Label = "Shuffle"
            };

            settingsApi.AddSetting(section, booleanSetting);
        }

private static void AddSingleChoice(IActivitiesSettingsService settingsApi, SettingsSection category)
        {
            var booleanSetting = new SingleValueSelectorDescription
            {
                DefaultValue = "pop",
                Values = new[] { "classic", "pop", "rock" },
                Description = "Sample single choice setting",
                // The value returned by GetDisplayValue should be localized
                GetDisplayValue = choice => choice + " music",
                Key = PresetKey,
                Label = "Mixer Preset"
            };

            settingsApi.AddSetting(category, booleanSetting);
        }

private static void AddSimpleString(IActivitiesSettingsService settingsApi, SettingsSection section)
        {
            var simpleStringSetting = new SingleValueEditorDescription<string>()
            {
                Description = "A free text comment that can't contain the word 'invalid'",
                // The GetDisplayValue obtains a localized screen representation of the underlying setting value.
                GetDisplayValue = LocalizeSimpleSettingValue,
                IsReadOnly = false,
                DefaultValue = "There is no comment",
                Label = "Comment",
                Validate = ValidateSimpleStringSetting,
                Key = CommentTextKey
            };
            // Add the setting to the section.
            // A setting may also be directly added on a category. It will appear as a setting without a section (top level setting)
            settingsApi.AddSetting(section, simpleStringSetting);
        }
private static string LocalizeSimpleSettingValue(string s) => $"A localized value of `{s}`";
private static string ValidateSimpleStringSetting(string arg)
        {
            if (arg?.ToLowerInvariant().Contains("invalid") == true)
            {
                return "The sample string setting is invalid if it contains the `invalid` keyword";
            }

            return string.Empty;
        }

public class MyLogMessageActivity : CodeActivity
{
    protected override void Execute(CodeActivityContext context)
    {
        var executorRuntime = context.GetExtension<IExecutorRuntime>();
        var jobInfo = executorRuntime.RunningJobInformation;
        executorRuntime.LogMessage(new LogMessage
        {
            EventType = TraceEventType.Warning,
            Message = $"Job {jobInfo.JobId}: My log message from workflow {jobInfo.WorkflowFilePath}"
        });
    }
}