Singleton C#

singleton-csharp.cs

namespace DataLib
{
    public class DataManager
    {
        public void Run()
        {
            DataProvider.Instance.RunQuery();
        }
    }
    public class DataProvider
    {
        private DataProvider()
        {

        }
        static DataProvider()
        {
            Instance = new DataProvider();
        }

        public void RunQuery()
        {

        }

        public static DataProvider Instance { get; }        
    }
}