/// <summary>
/// Convert StringBuilder to Stream.
/// Depending on the size, appropriate stream will be used.
/// </summary>
/// <param name="sb">string builder</param>
/// <returns>utf8 stream</returns>
public static Stream ToStream(this StringBuilder sb)
{
if (sb.Length < 8192)
return new MemoryStream(Encoding.UTF8.GetBytes(sb.ToString()));
var cms = ChunkedMemoryStream.Create();
var sw = new StreamWriter(cms);
sw.WriteBuilder(sb);
sw.Flush();
cms.Position = 0;
return cms;
}
