Entity Framework Implementation Using ASP.NET MVP

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace TestMVPApp.Model
{

	public interface IModel
	{
		List<Tbl_UserDetails> ReturnDetails();
	}


	public class TestModel : IModel
	{
		private Entities textContext = new Entities();
		private Tbl_UserDetails testDetails;
		private IEnumerable<Tbl_UserDetails> detailsList;
		public TestModel() { }

		public bool SaveDetails(string firstName, string middleName, string lastName, string address, string contactNo)
		{
			testDetails = new Tbl_UserDetails()
			{
				FirstName = firstName,
				MiddleName = middleName,
				LastName = lastName,
				Address = address,
				ContactNo = contactNo
			};
			textContext.AddToTbl_UserDetails(testDetails);
			int testValue = textContext.SaveChanges();
			if (testValue > 0)
			{
				return true;
			}
			else
			{
				return false;
			}

		}
		
		public List<Tbl_UserDetails> ReturnDetails()
		{
			//detailsList = from v in textContext.GetDetails() select v;
			return detailsList.ToList<Tbl_UserDetails>();
		}

	}
}