Use Entity Framework Code First to connect to a table in an existing database

EfConnectExistingTable.cs

using System.Data.Entity;
using MyProject.Models;

namespace MyProject.Database
{
    public class MyDatabase : DbContext
    {
        //  add a connection string in Web.config
        // <add name="MyConnection" connectionString="Server=localhost;Database=MyDatabase;Trusted_Connection=true;" providerName="System.Data.SQLClient" />
        public MyDatabase() : base("MyConnection") { }

        public virtual DbSet<MyTable> ExistingTable { get; set; }
        
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<MyTable>().ToTable("MyTable", schemaName: "myschema");
            base.OnModelCreating(modelBuilder);
        }
    }
}