using System;

using System.Xml.Linq;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        XElement setting = XElement.Parse("<engines></engines>");

        Console.WriteLine(setting);

        var providers = setting.Descendants("add").ToList();

        var statusIsExists = providers.Any(x => x.Attribute("name").Value.Equals("RecordStatusIsRuleCondition", StringComparison.InvariantCultureIgnoreCase));

        if (!statusIsExists)

        {

            var elementToAdd = new XElement("add",

                                            new XAttribute("name", "RecordStatusIsRuleCondition"),

                                            new XAttribute("type", "Adam.Core.Rules.RecordStatusIsRuleCondition, Adam.Core"),

                                            new XAttribute("webControl", "Adam.Web.Extensions.Providers.Rules.RecordStatusIsRuleConditionEditor, Adam.Web.Extensions")

                                           );

            setting.Add(elementToAdd);

        }

​

        var statusChangedExists = providers.Any(x => x.Attribute("name").Value.Equals("RecordStatusChangedRuleCondition", StringComparison.InvariantCultureIgnoreCase));

        if (!statusChangedExists)

        {

            var elementToAdd = new XElement("add",

                                            new XAttribute("name", "RecordStatusChangedRuleCondition"),

                                            new XAttribute("type", "Adam.Core.Rules.RecordStatusChangedRuleCondition, Adam.Core"),

                                            new XAttribute("webControl", "Adam.Web.Extensions.Providers.Rules.RecordStatusChangedRuleConditionEditor, Adam.Web.Extensions")

                                           );

            setting.Add(elementToAdd);

        }

​

        var statusChangedToExists = providers.Any(x => x.Attribute("name").Value.Equals("RecordStatusChangedToRuleCondition", StringComparison.InvariantCultureIgnoreCase));

        if (!statusChangedToExists)

        {

            var elementToAdd = new XElement("add",

                                            new XAttribute("name", "RecordStatusChangedToRuleCondition"),

                                            new XAttribute("type", "Adam.Core.Rules.RecordStatusChangedToRuleCondition, Adam.Core"),

                                            new XAttribute("webControl", "Adam.Web.Extensions.Providers.Rules.RecordStatusChangedToRuleConditionEditor, Adam.Web.Extensions")

                                           );

            setting.Add(elementToAdd);

        }

​

        var masterPreviewExists = providers.Any(x => x.Attribute("name").Value.Equals("MasterPreviewExistsRuleCondition", StringComparison.InvariantCultureIgnoreCase));

        if (!masterPreviewExists)

        {

            var elementToAdd = new XElement("add",

                                            new XAttribute("name", "MasterPreviewExistsRuleCondition"),

                                            new XAttribute("type", "Adam.Core.Rules.MasterPreviewExistsRuleCondition, Adam.Core"),

                                            new XAttribute("webControl", "Adam.Web.Extensions.Providers.Rules.MasterPreviewExistsRuleConditionEditor, Adam.Web.Extensions")

                                           );

            setting.Add(elementToAdd);

        }

​

        var masterPreviewChanged = providers.Any(x => x.Attribute("name").Value.Equals("MasterPreviewChangedRuleCondition", StringComparison.InvariantCultureIgnoreCase));

        if (!masterPreviewChanged)

        {

            var elementToAdd = new XElement("add",

                                            new XAttribute("name", "MasterPreviewChangedRuleCondition"),

                                            new XAttribute("type", "Adam.Core.Rules.MasterPreviewChangedRuleCondition, Adam.Core"),

                                            new XAttribute("webControl", "Adam.Web.Extensions.Providers.Rules.MasterPreviewChangedRuleConditionEditor, Adam.Web.Extensions")

                                           );

            setting.Add(elementToAdd);

        }

        Console.WriteLine(setting);

​

    }

}