GitUI.RevisionGrid.SearchForward C# (CSharp) Method

        private int? SearchForward(int startIndex, string searchString)
        {
            // Check for out of bounds roll over if required
            int index;
            if (startIndex < 0 || startIndex >= Revisions.RowCount)
                startIndex = 0;

            for (index = startIndex; index < Revisions.RowCount; ++index)
            {
                if (GetRevision(index).MatchesSearchString(searchString))
                    return index;
            }

            // We didn't find it so start searching from the top
            for (index = 0; index < startIndex; ++index)
            {
                if (GetRevision(index).MatchesSearchString(searchString))
                    return index;
            }

            return null;
        }