nuget-extensions/nuget-commands/src.2.8/QueryBuilder.cs [45:76]:
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        .ToList();

      while (expressions.Count > 1)
      {
        var left = expressions.Where((x, i) => i % 2 == 0).ToList();
        var right = expressions.Where((x, i) => i % 2 == 1).ToList();
        expressions = ZipEx(left, right, Expression.Or).ToList();
      }

      if (expressions.Count == 0)
        return Expression.Constant(true);

      return expressions.Single();
    }

    private static IEnumerable<T> ZipEx<T>(IEnumerable<T> left, IEnumerable<T> right, Func<T, T, T> zip)
    {
      var enuLeft = left.GetEnumerator();
      var enuRight = right.GetEnumerator();

      bool hasLeft;
      bool hasRight;
      do
      {
        hasLeft = enuLeft.MoveNext();
        hasRight = enuRight.MoveNext();

        if (hasLeft && hasRight) yield return zip(enuLeft.Current, enuRight.Current);
        else if (hasLeft) yield return enuLeft.Current;
        else if (hasRight) yield return enuRight.Current;

      } while (hasLeft || hasRight);
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nuget-extensions/nuget-commands/src/QueryBuilder.cs [45:76]:
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        .ToList();

      while (expressions.Count > 1)
      {
        var left = expressions.Where((x, i) => i % 2 == 0).ToList();
        var right = expressions.Where((x, i) => i % 2 == 1).ToList();
        expressions = ZipEx(left, right, Expression.Or).ToList();
      }

      if (expressions.Count == 0)
        return Expression.Constant(true);

      return expressions.Single();
    }

    private static IEnumerable<T> ZipEx<T>(IEnumerable<T> left, IEnumerable<T> right, Func<T, T, T> zip)
    {
      var enuLeft = left.GetEnumerator();
      var enuRight = right.GetEnumerator();

      bool hasLeft;
      bool hasRight;
      do
      {
        hasLeft = enuLeft.MoveNext();
        hasRight = enuRight.MoveNext();

        if (hasLeft && hasRight) yield return zip(enuLeft.Current, enuRight.Current);
        else if (hasLeft) yield return enuLeft.Current;
        else if (hasRight) yield return enuRight.Current;

      } while (hasLeft || hasRight);
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