I am using entity framework code first and mapping our unidata files to tables to get data. I am wanting to join the tables or use navigation properties. The 2 tables share a common field called WorkInProgressOperationId. I have tried using join and navigation properties but it does not seem to work when mapping to unidata files.Is this possible?

        public class WorkInProgressMapping : EntityTypeConfiguration<WorkInProgress>
{

    public WorkInProgressMapping()
    {          
        this.ToTable("WIPMASTER");
        this.HasKey(e => e.WorkInProgressId).Ignore(e => e.EntityId);           
        this.Property(e => e.WorkInProgressId).HasColumnName("@ID");
        this.Property(e => e.SequenceNumber).HasColumnName("OPER_SEQ_NBR");
        this.Property(e => e.WorkOrderNumber).HasColumnName("WORK_ORDER");
        this.Property(e => e.StartQuantity).HasColumnName("SCHED_COMP_QTY");
        this.Property(e => e.JobNumber).HasColumnName("JOB_NBR");
        this.Property(e => e.JobDetailId).HasColumnName("JOBDET_ID");
        this.Property(e => e.ComputerGeneratedNumber).HasColumnName("CPN");
        this.Property(e => e.ItemNumber).HasColumnName("ITEM_NBR");
        this.Property(e => e.ParentWorkOrder).HasColumnName("PARENT_WO");
        this.Property(e => e.ParentDueDate).HasColumnName("SCHED_COMP_DATE");
        this.Property(e => e.WorkOrderIssueDate).HasColumnName("RELEASE_DATE");
        this.Property(e => e.WorkInProgressOperationId).HasColumnName("WIPOPERACT_ID");
    }
}

        public class WorkInProgressOperationMapping : EntityTypeConfiguration<WorkInProgressOperation>
{

    public WorkInProgressOperationMapping()
    {
       this.ToTable("WIPOPER");
       this.HasKey(e => e.WorkInProgressOperationId).Ignore(e => e.EntityId);
       this.Property(e => e.WorkInProgressOperationId).HasColumnName("@ID");
       this.Property(e => e.OperationNumber).HasColumnName("OPERATION_NBR");
       this.Property(e => e.OperationSequence).HasColumnName("OPER_SEQ");
       this.Property(e => e.WorkOrder).HasColumnName("WORK_ORDER");
       this.Property(e => e.NextSequence).HasColumnName("NEXT_SEQ");
       this.Property(e => e.Status).HasColumnName("OPER_STATUS");
       this.Property(e => e.QuantityComplete).HasColumnName("QTY_COMPLETE");
       this.Property(e => e.SalesOrderDeliveryDate).HasColumnName("DUE_SO");
       this.Property(e => e.WorkOrderDeliveryDate).HasColumnName("WO_DUE");
       this.Property(e => e.StartingQuantity).HasColumnName("EXP_START_QTY");

    }
}

Another Example : One to Many Relation (U2 Tables/Files)

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test_EF5
{


    public class Customer
    {
        public string CustomerID { get; set; }
        public string FirstName { get; set; }

        public virtual ICollection<Rental> Rentals { get; set; }
    }

    public class Rental
    {
        public string RentalID { get; set; }
        public string CustomerID { get; set; }
        public decimal Balance { get; set; }
        public virtual Customer Customer { get; set; }
    }

    public class CustomerMapping : EntityTypeConfiguration<Customer>
    {
        public CustomerMapping()
        {
            this.ToTable("MEMBERS");
            this.Property(e => e.CustomerID).HasColumnName("MEMBERS_PK");
            this.Property(e => e.FirstName).HasColumnName("FIRST_NAME");
            this.HasKey(e => e.CustomerID);
        }

    }

    public class RentalMapping : EntityTypeConfiguration<Rental>
    {
        public RentalMapping()
        {
            this.ToTable("RENTAL_DETAILS");
            this.Property(e => e.RentalID).HasColumnName("RENTAL_DETAIL_PK");
            this.Property(e => e.Balance).HasColumnName("BALANCE.DUE");
            this.Property(e => e.CustomerID).HasColumnName("CUSTOMER.CODE");


            this.HasKey(e => new { e.RentalID });
            HasRequired(p => p.Customer)
                .WithMany(b => b.Rentals)
                .HasForeignKey(p => new { p.CustomerID });

        }

    }

    public class CustomerContext : DbContext
    {
        public CustomerContext()
        {

        }
        public DbSet<Customer> Customers { get; set; }
        public DbSet<Rental> Rentals { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.Configurations.Add(new CustomerMapping());
            modelBuilder.Configurations.Add(new RentalMapping());

        }
    }
}