void InitDatabase()
        {
            Database.SetInitializer<KsigDoContext>(new DropCreateDatabaseIfModelChanges<KsigDoContext>());

            using (var context = new KsigDoContext())
            {
                context.Database.Connection.ConnectionString = myCon;
                var dbi = context.Configuration;
                try
                {
                    SqlConnection sql = new SqlConnection(myCon);
                    sql.Open();//<------------ работает
                    sql.Close();
                    
                    context.Database.Connection.Open();//<------------ работает
                    context.Database.Connection.Close();

                    if (context.Tasks.Count() == 0)// <-----------ERROR
                    {

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible.