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IntroductionThis article demonstrates an interesting and very useful concept in Entity Framework.Question: What is entity data source?In simple terms "It is a data source that performs CRUD, filtering, querying and so on, all based on a data model. This reduces the development effort by performing various operations in an easy and manageable manner".Step 1: Create a new web applicationStep 2: Add a new Entity Framework modelStep 3: Adding a new grid view and choosing data sourceStep 4: The complete code of WebForm1.aspx is as in the following:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="EntityDataSourceApp.WebForm1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title></title></head><body> <form id="form1" runat="server"> <center> <div> <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" CellPadding="2" DataKeyNames="EmpId" DataSourceID="EntityDataSource1" ForeColor="Black" GridLines="None"> <AlternatingRowStyle BackColor="PaleGoldenrod" /> <Columns> <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" /> <asp:BoundField DataField="EmpId" HeaderText="EmpId" ReadOnly="True" SortExpression="EmpId" /> <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" /> <asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" /> <asp:BoundField DataField="Age" HeaderText="Age" SortExpression="Age" /> </Columns> <FooterStyle BackColor="Tan" /> <HeaderStyle BackColor="Tan" Font-Bold="True" /> <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" /> <SortedAscendingCellStyle BackColor="#FAFAE7" /> <SortedAscendingHeaderStyle BackColor="#DAC09E" /> <SortedDescendingCellStyle BackColor="#E1DB9C" /> <SortedDescendingHeaderStyle BackColor="#C2A47B" /> </asp:GridView> <asp:EntityDataSource ID="EntityDataSource1" runat="server" ConnectionString="name=CompanyEntities" DefaultContainerName="CompanyEntities" EnableDelete="True" EnableFlattening="False" EnableInsert="True" EnableUpdate="True" EntitySetName="tblEmployee"> </asp:EntityDataSource> </div> </center> </form></body></html>Step 5: The complete code of WebForm1.aspx.cs is as in the following:using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace EntityDataSourceApp{ public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } }}Step 6: The output of the application is as in the following:I hope this article was useful for you.