just a trial this is some opensource subsonic code

public CTestInfoCollection Filter()
        {
            for (int i = this.Count - 1; i > -1; i--)
            {
                CTestInfo o = this[i];
                foreach (SubSonic.Where w in this.wheres)
                {
                    bool remove = false;
                    System.Reflection.PropertyInfo pi = o.GetType().GetProperty(w.ColumnName);
                    if (pi.CanRead)
                    {
                        object val = pi.GetValue(o, null);
                        switch (w.Comparison)
                        {
                            case SubSonic.Comparison.Equals:
                                if (!val.Equals(w.ParameterValue))
                                {
                                    remove = true;
                                }
                                break;
                        }
                    }
                    if (remove)
                    {
                        this.Remove(o);
                        break;
                    }
                }
            }
            return this;
        }