public override IQueryCondition CreateCondition(string attribute, ExpressionOperation operation, string source)
{
var condition = CreateConditionDef(attribute, ExpressionOperation.And, source); // new QueryConditionDef {AttributeName = attribute, Operation = operation, Exp = source};
Parent.AddCondition(condition);
//Condition.WhereConditions.Add(condition);
return(new QueryConditionBuilder(this /*Parent*/, condition));
}