Create the settings contract

The next step is to create the settings contract. It is a class implementing ISettingsDataContract and provides the functionality to save settings and load the default value of the settings.

To do this, perform the following:

1. Create a class and name it****MyCustomSettingsContract.cs
2. Inside paste the following code:
   C#

   using System;
   using System.Runtime.Serialization;
   using Telerik.Sitefinity.Configuration;
   using Telerik.Sitefinity.SiteSettings;
   
   namespace SitefinityWebApp.CustomSettings
   {
       [DataContract]
       public class MyCustomSettingsContract : ISettingsDataContract
       {
           [DataMember]
           public string RandomVariable
           {
               get;
               set;
           }
   
           public void LoadDefaults(bool forEdit = false)
           {
               MyConfig section;
               if (forEdit)
                   section = ConfigManager.GetManager().GetSection<MyConfig>();
               else
                   section = Config.Get<MyConfig>();
   
               String randVariable = section.UIRandomVariableSettings.CurrentRandomVariable ?? "-1";
   
               this.RandomVariable = randVariable;
           }
   
           public void SaveDefaults()
           {
               var manager = ConfigManager.GetManager();
               var section = manager.GetSection<MyConfig>();
               section.UIRandomVariableSettings.CurrentRandomVariable = this.RandomVariable;
               manager.SaveSection(section);
           }
       }
   }

NOTE: The contract has property RandomVariable that persists in the configuration file and saves the value in method SaveDefaults(). For that purpose, you use the API for working with configuration files.