Steps to Achieve:
- Create a console Application in Visual Studio and add (Microsoft.Crm.Sdk.Proxy.dll, Microsoft.Xrm.Sdk.dll) in references section.
- Download this C# Class files to get crm service ,If you have this files just skip this step https://www.dropbox.com/s/pyj6zym6u9ea7wp/deviceidmanager.cs?dl=0 https://www.dropbox.com/s/q82xp39jn0nqi0j/OnlineService.cs?dl=0
- Open OnlineService.cs file and enter your crm credentials as shown below
            credentials.UserName.UserName = "Username@Domain.onmicrosoft.com";//Username
            credentials.UserName.Password = "yourpasswordhere";//Password
            var _servproxy = new OrganizationServiceProxy(new     Uri("https://Domain.api.crm5.dynamics.com/XRMServices/2011/Organization.svc"), null,   credentials, GetDeviceCredentials());//ServerUrl
Code Snippet:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Messages;
namespace SampleCrudOperations
{
    class CrudOperations
    {
        public void CreateRecord()
        {
            IOrganizationService service = OnlineService.servproxy;//To get CRM Service
            if (service != null)
            {
                Entity myentity = new Entity("new_employee");
                myentity.Attributes["new_name"] = "Rahul";
                myentity.Attributes["new_ename"] = "Veldandi";
                myentity.Attributes["new_employeesalary"] = new Money(23000);//Currency
                myentity.Attributes["new_employeelocation"] = new OptionSetValue(100000003);//optionset
                myentity.Attributes["new_employeehobbies"] = "TV \n Playing Cricket";//MultiLineText
                myentity.Attributes["new_employeegender"] = false;//Two Options                myentity.Attributes["new_employeeaccount"] = new EntityReference("account", new Guid("A478321B-E44C-E511-8102-C4346BADA644"));//Lookup
                myentity.Attributes["new_department"] = new EntityReference("new_department", new Guid("E07CB8D2-6C50-E511-810E-C4346BAD5740"));//Lookup
                myentity.Attributes["createdon"] = new DateTime(2015, 09, 11);//Date Time
                service.Create(myentity);
                Console.WriteLine("Record Created Successfully");
            }
        }
        public void RetrieveRecord()
        {
            Entity et = OnlineService.servproxy.Retrieve("new_employee", new Guid("BF18416B-2E58-E511-810E-C4346BAD3768"), new ColumnSet(true));
            string name = et["new_name"].ToString();
            string hobbies = et["new_employeehobbies"].ToString();
            string account = et.GetAttributeValue<EntityReference>("new_employeeaccount").Name;
            string gender = et.FormattedValues["new_employeegender"].ToString();
            string location = et.FormattedValues["new_employeelocation"].ToString();
            string dept = et.GetAttributeValue<EntityReference>("new_department").Name;
            decimal sal = et.GetAttributeValue<Money>("new_employeesalary").Value;
            Console.WriteLine("employee Name:" + name);
            Console.WriteLine("employee hobbies:" + hobbies);
            Console.WriteLine("employee account" + account);
            Console.WriteLine("employee gender" + gender);
            Console.WriteLine("employee location" + location);
            Console.WriteLine("employee department" + dept);
            Console.WriteLine("employee salary" + sal);
        }
        public void UpdateRecord()
        {
            Entity myet = OnlineService.servproxy.Retrieve("new_employee", new Guid("BF18416B-2E58-E511-810E-C4346BAD3768"), new ColumnSet("new_employeesalary", "new_employeelocation", "new_employeeaccount", "new_employeehobbies"));
            Console.WriteLine("Enter Employee salary");
            decimal sal = Convert.ToDecimal(Console.ReadLine());
            myet["new_employeesalary"] = new Money(sal); ;
            myet["new_employeelocation"] = new OptionSetValue(100000002);
            myet["new_employeeaccount"] = new EntityReference("account", new Guid("9C78321B-E44C-E511-8102-C4346BADA644"));
            myet["new_employeehobbies"] = "Watching TV";
            OnlineService.servproxy.Update(myet);
            Console.WriteLine("Record Updated Successfully");
        }
        public void delete()
        {
            OnlineService.servproxy.Delete("new_employee", new Guid("24E6B2EF-7B57-E511-810A-C4346BADB280"));
            Console.WriteLine("Record Deleted Sucessfully");
        }
        public void multiretrive()
        {
            QueryExpression query = new QueryExpression();
            query.EntityName = "new_employee";
            query.ColumnSet = new ColumnSet(true);
            RetrieveMultipleRequest request = new RetrieveMultipleRequest();
            request.Query = query;
            RetrieveMultipleResponse responce = (RetrieveMultipleResponse)OnlineService.servproxy.Execute(request);
            foreach (Entity emp in responce.EntityCollection.Entities)
            {
                string name = emp["new_name"].ToString();
                string hobbies = emp["new_employeehobbies"].ToString();
                string account = emp.GetAttributeValue<EntityReference>("new_employeeaccount").Name;
                string gender = emp.FormattedValues["new_employeegender"].ToString();
                string location = emp.FormattedValues["new_employeelocation"].ToString();
                string dept = string.Empty;
                if (emp.Attributes.Contains("new_department"))
                {
                    dept = emp.GetAttributeValue<EntityReference>("new_department").Name;
                }
                decimal sal = emp.GetAttributeValue<Money>("new_employeesalary").Value;
                Console.WriteLine("employee Name : " + name);
                Console.WriteLine("employee hobbies : " + hobbies);
                Console.WriteLine("employee account : " + account);
                Console.WriteLine("employee gender : " + gender);
                Console.WriteLine("employee location : " + location);
                Console.WriteLine("employee department : " + dept);
                Console.WriteLine("employee salary : " + sal);
            }
        }
    }
}
Finally Call all the methods in Program.cs file..Like below
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Messages;
namespace SampleCrudOperations
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter Your Choice: C for Create , U for update  , D for delete");
            char ch =char.Parse(Console.ReadLine());
            switch (ch)
            {
                case 'c':
                    CrudOperations c = new CrudOperations();
                    c.create();
                    break;
                case 'u':
                    CrudOperations u = new CrudOperations();
                    u.update();
                    break;
                case 'd':
                    CrudOperations d = new CrudOperations();
                    d.delete();
                    break;
                default:
                    Console.WriteLine("Please Choose any one from given choices");
                    break;
            }
            Console.ReadLine();
        }
    }
}
Thank you.......
 
 
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