Umbraco-CMS/src/Umbraco.Core/Persistence/Constants-DbProviderNames.cs

 // ReSharper disable once CheckNamespace
namespace Umbraco.Cms.Core
{
    static partial class Constants
    {
        public static class DbProviderNames
        {
            public const string SqlServer = "Microsoft.Data.SqlClient";
            public const string SqlCe = "System.Data.SqlServerCe.4.0";
        }
    }
}