PutioFS.Core.LocalFileCache.GetNextBufferRange C# (CSharp) Method

        public LongRange GetNextBufferRange(long offset)
        {
            if (offset >= this.PutioFile.Size)
                return null;

            lock (this.RangeCollection)
            {
                LongRange BufferThis = new LongRange(0, this.PutioFile.Size);
                int index = this.RangeCollection.BinaryIndexSearch(offset);
                if (index < 0)
                {
                    BufferThis.Start = offset;
                    index = this.RangeCollection.Bisect(offset);
                    if (index < this.RangeCollection.RangeSet.Count)
                        BufferThis.End = this.RangeCollection.RangeSet.ElementAt(index).Start;
                    else
                        BufferThis.End = this.PutioFile.Size;
                }
                else
                {
                    return this.GetNextBufferRange(this.RangeCollection.RangeSet.ElementAt(index).End);
                }

                return BufferThis;
            }
        }