title: dataclassesdatacontext' does not contain a constructor that takes 0 arguments?
body: <p>This is my DBML Designer Code</p>
  
  <pre><code>    using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Data.Linq;
  using System.Data.Linq.Mapping;
  using System.Linq;
  using System.Linq.Expressions;
  using System.Reflection;
  
  
  
  public partial class DataClassesDataContext  : System.Data.Linq.DataContext 
  
  {
  
      private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
  
    #region Extensibility Method Definitions
    partial void OnCreated();
    #endregion
  
      public DataClassesDataContext(string connection) : 
              base(connection, mappingSource)
  
      {
          OnCreated();
      }
  
      public DataClassesDataContext(System.Data.IDbConnection connection) : 
              base(connection, mappingSource)
      {
          OnCreated();
      }
  
      public DataClassesDataContext(string connection, System.Data.Linq.Mapping.MappingSource mappingSource) : 
              base(connection, mappingSource)
      {
          OnCreated();
      }
  
      public DataClassesDataContext(System.Data.IDbConnection connection, System.Data.Linq.Mapping.MappingSource mappingSource) : 
              base(connection, mappingSource)
      {
          OnCreated();
      }
  
  }
  </code></pre>
  
  <p>this is my C# code</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Data.Linq;
  
  
  
  public partial class Login : System.Web.UI.Page
  {
      protected void Page_Load(object sender, EventArgs e)
      {
  
      }
      protected void cmdLogin_Click(object sender, EventArgs e)
      {
          DataClassesDataContext db = new DataClassesDataContext();
  
      }
  }
  </code></pre>
  
  <p>when i write the DataClassesDataContex db=new DataClassesDataContex(); it will show DataClassesDataContex does not  contain a constructor that takes 0 arguments?</p>