C#

public DeleteByAddressIdResponse DeleteByAddressId(int Id)
{
    Func<ClientAddressEntity, bool> whereClause = ca => ca.AddressId == Id;

    return deleteClientAddresses<DeleteByAddressIdResponse >(whereClause);
}


public DeleteByAddressTypeIdResponse DeleteByAddressTypeId(int Id)
{
    Func<ClientAddressEntity, bool> whereClause = ca => ca.AddressTypeId == Id;

    return deleteClientAddresses<DeleteByAddressTypeIdResponse >(whereClause);
}


public DeleteByClientIdResponse DeleteByClientId(int Id)
{
    Func<ClientAddressEntity, bool> whereClause = ca => ca.ClientId == Id;

    return deleteClientAddresses<DeleteByClientIdResponse >(whereClause);
}

private T deleteClientAddresses<T>(Func<ClientAddressEntity, bool> whereClause) where T : _ResponseBase
{
    var response = (T)Activator.CreateInstance(typeof(T));

    using (var dc = getDataContext())
    {
        // ============>  HOW DO I APPLY THERE WHERE CLAUSE HERE??? <=============
        var entities = (from ca in dc.ClientAddresses select ca);

        foreach (var entity in entities)
        {
            var deleteAddressResponse = DeleteAddress(entity.AddressId);

            if (deleteAddressResponse.Result == Result.Success)
            {
                entity.IsDeleted = true;

                try
                {
                    dc.SubmitChanges();
                }
                catch (Exception e)
                {
                    response.Exception = e;
                    break;
                }
            }
            else
            {
                response.Exception = deleteAddressResponse.Exception;
            }
        }
    }

    return response;
}