Hi,
How about using Regex.Replace as the following?
System.Text.RegularExpressions.Regex.Replace(yourString,"(?<=\r\n)(.+?)(?= \d{4,5} (?:[\w]+: |Documents))(?:[^a-zA-Z]+)([^\s]+)\s(.+)(?= [A-Z0-9]+ /) (.+)(?=/ \d{2}/\d{2}/\d{4})(?:.*)(?<=\d{2}:\d{2}:\d{2}\s)([\d]+)","")
Regards,