C# What to do if connection fails with Entity Framework

Question

I'm sorry for the rudimentary question.

I created a program to connect to PostgreSQL(NpgSQL) using Entity Framework 6 in a C# console app.

If the connection to the database fails, what should I do if I want to try to reconnect?

static void GetStartProcessTime()
{

  try
    {
        using (var context = new DbContext())
        {
            var processingTimeTable = context.CheckprocessingTimeTable.First(x => x.id== 1);
            processingTimeTable.CreateDate = DateTime.Now;

            context.SaveChanges();
        }
    }

   catch(Exception ex)
   {
       // How to write a reconnection?
   }
}

I searched for an example like this, but I couldn't find it, and I don't know how to use it.

If it is a function that can retry even if the connection fails like this, please tell me how to do it with PostgreSQL.

Sorry for the poor English and the rudimentary questions.