[Solved]-Linq query and multiple where clauses with OR only first condition gets evaluated-LINQ,C#

Your linq query looks ok to me

public class Users
    {
      public string Username {get;set;}
      public string Userid {get;set;}
    }

void Main()
{
    var users = new List<Users>{new Users {Username="johndoe",Userid="123"},
                                new Users {Username="stevejobs",Userid="456"}
                                };

    var filter = users.Where(a => (a.Username.Equals("123") || a.Userid.Equals("123"))).ToList();
    filter.Dump();
    var filter2 = users.Where(a => (a.Username.Equals("456") || a.Userid.Equals("456"))).ToList();
    filter2.Dump();
}