using Microsoft.Crm.Sdk;
using Microsoft.Crm.Sdk.Query;
using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Crm.Sdk.Metadata;
using Microsoft.Crm.SdkTypeProxy.Metadata;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;


namespace CRMTutorial
{
    class CRMClass
    {
        public BusinessEntityCollection getallrecod_byexpression(CrmService _crmservice, string _entityname, string[] _columnset) 
        {
            QueryExpression q_expression = new QueryExpression(_entityname);
            q_expression.ColumnSet = new ColumnSet(_columnset);

            RetrieveMultipleRequest request = new RetrieveMultipleRequest();
            request.Query = q_expression;
            request.ReturnDynamicEntities = true;
            RetrieveMultipleResponse response = (RetrieveMultipleResponse)_crmservice.Execute(request);
            BusinessEntityCollection returnentities = response.BusinessEntityCollection;

            return returnentities;

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Crm.Sdk;
using Microsoft.Crm.Sdk.Query;
using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Crm.Sdk.Metadata;
using Microsoft.Crm.SdkTypeProxy.Metadata;
using System.IO;

namespace CRMTutorial
{
    class Program
    {
        static void Main(string[] args)
        {

                //create object from crm class

                CRMClass mycrmclass = new CRMClass();  

                BusinessEntityCollection entities = mycrmclass.getallrecod_byexpression(service, "your entity name", new string[] { "your attribute name" });

  if (entities.BusinessEntities.Count > 0)
  {
   foreach (DynamicEntity entityname in entities.BusinessEntities)
   {
       string attributetoshow= entityname.Properties["your attribute name"].ToString();

   }
  }
            
        }
    }
}

CRM is a business arrangement that helps organizations enhance promoting, deals, administration and responsibility to its clients to build the productivity of the association, while enhancing the client experience. Presently I need to share a tad bit involvement being developed crm. Acctualy I am Microsoft Dynamic CRM 2011, however for some anticipate still utilize crm 2007. so I need to relocate my code from element crm 2011 to dynamic crm 2007. It's exceptionally defferent code

1. config
2. Main Program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Crm.Sdk;
using Microsoft.Crm.Sdk.Query;
using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Crm.Sdk.Metadata;
using Microsoft.Crm.SdkTypeProxy.Metadata;
using System.IO;
using System.Xml.Linq;
using System.Xml;
using System.Configuration;


namespace CRMTutorial
{
    class Program
    {
        static void Main(string[] args)
        {
        
 string _crmserviceurl = ConfigurationManager.AppSettings["CRMServerURL"];
        string _organization = ConfigurationManager.AppSettings["CRMOrganization"];
        string _username = ConfigurationManager.AppSettings["CRMUsername"];
        string _password = ConfigurationManager.AppSettings["CRMPassword"];
        string _domain = ConfigurationManager.AppSettings["CRMDomain"];
      
        CrmAuthenticationToken mytoken = new CrmAuthenticationToken();
        mytoken.AuthenticationType = 0;
        mytoken.OrganizationName = this._organization;

        NetworkCredential mycredential = new NetworkCredential();
        mycredential.UserName = this._username;
        mycredential.Password = this._password;
        mycredential.Domain = this._domain;

        CrmService service = new CrmService();
        service.Url = _crmserviceurl;
        service.UseDefaultCredentials = false;
        service.CrmAuthenticationTokenValue = mytoken;
        service.Credentials = mycredential; 
   
  /*Your code here
  call the service crm
  */ 
  
        }
    }
}