void Main()
{
        var queryResults =
        from c in dbContxt.customers
        let cloumns=dbContxt.ExecuteQuery<temp>("select   name  from   syscolumns   where   id=object_id(N'customers')","");
        where cloumns.All(d=>GetPropertyValue(c,d.name)=="T")
         select c;
     
}
public class temp
{
  public string name{get;set;}
}
private static object GetPropertyValue(object obj, string property)  
{  
    System.Reflection.PropertyInfo propertyInfo=obj.GetType().GetProperty(property);  
    return propertyInfo.GetValue(obj, null);  
}