IT/Software career thread: Invert binary trees for dollars.

namespace SchoolDataLayer
{
    public class Context: DbContext
    {
        public SchoolDBContext() : base("name=NAMEOFCONNECTIONSTRING")
        {
        }
    }
}

  <connectionStrings>
    <add name="NAMEOFCONNECTIONSTRING"
    connectionString="Data Source=.;Initial Catalog=DATABASENAME;Integrated Security=true"
    providerName="System.Data.SqlClient"/>
    </connectionStrings>

using System.Data.Entity;

namespace MachineReport.DataContext
{
  
    public class ReportContext : DbContext
    {
        public ReportContext() : base("name=MyConnectionString")
        {
        }
    }
}

public abstract class Entity : IObjectState
    {
        #region Public Properties

        [NotMapped]
        public ObjectState ObjectState
        {
            get;
            set;
        }

        #endregion
    }
    public interface IObjectState
    {
        #region Public Properties

        [NotMapped]
        ObjectState ObjectState
        {
            get;
            set;
        }

        #endregion
    }
    public enum ObjectState
    {
        Unchanged,
        Added,
        Modified,
        Deleted
    }

namespace MachineReport.Models
{
    [Table("Salaries")]
    public class Salary :Entity
    {
        /// <summary>
        /// Main Key, by using conventions, EF will understand that this is an identity column, an ever increasing integer.
        /// </summary>
        public int SalaryId
        {
            get; set;
        }


        /// <summary>
        /// Required Database field with ammount
        /// </summary>
        [Required]
        public decimal Amount
        {
            get; set;
        }

        [MaxLength(300)]
        public string FixedLenth
        {
            get; set;
        }

        public string VeryLongString
        {
            get; set;
        }


        /// <summary>
        /// Required Database fieled with date of effectiveness
        /// </summary>
        [Required]
        public DateTime EffectiveOn
        {
            get; set;
        }

        [Required]
        public bool Inactive
        {
            get; set;
        }

       
        public bool? Deleted
        {
            get; set;
        }
    }
}

public class ReportContext : DbContext
    {
        public ReportContext() : base("name=ReportConnectionString")
        {
            // this forces you to generate the migrations files manually. Its better because you will learn how it affects teh database
            Configuration.AutoDetectChangesEnabled = false;

            // This disables Lazy loading. LAzy laoding its good for simplicity, but bad for database performance.
            Configuration.LazyLoadingEnabled = false;

            // When lazy is on, proxy are created to create the entities. since we dont have laze, we turn it off
            Configuration.ProxyCreationEnabled = false;

            // DAtabase timeout
            Database.CommandTimeout = 300;

        }

        #region Db sets or tables
       
        public DbSet<Salary> Salaries
        {
            get; set;
        }

        #endregion
    }