Added code example link in XML doc for GetChecksum() so that example will be included in CHM when it's built.
Added code example link in XML doc for GetChecksum() so that example will be included in CHM when it's built.

shaneray/ShaneSpace.FtpClient,robinrodricks/FluentFTP,hgupta9/FluentFTP,shaneray/ShaneSpace.FtpClient,robinrodricks/FluentFTP,worstenbrood/FluentFTP,kendallb/System.Net.FtpClient,robinrodricks/FluentFTP