正则表达式要列出，要控制台打印附加，由于匹配任何字符而出现异常

Question

Looking at the code below:

this.line = Regex.Matches(source, @".+(?<=\s(F|D|B|S|T))\d+.+").Cast<Match>().Select(match => match.Value).ToList();

            foreach (string item in this.line)
            {
                Console.WriteLine(item + " text");
            }

You would expect this source :

HEADER
[    
Y22 Z48*2 T4 B12 Desc
X46 Y60*5 S2 D B13 P9
X104 Y124*2 F2 T1 B10 M21
]
...

to be appended as follows:

Y22 Z48*2 T4 B12 Desc text
X46 Y60*5 S2 D B13 P9 text
X104 Y124*2 F2 T1 B10 M21 text

But I am getting this:

 text48*2 T4 B12 Desc
 text60*5 S2 D B13 P9
 textY124*2 F2 T1 B10 M21

The appended string is overwriting the item . The reason this is happening from what I can tell is because of the .+ where any character is matched infinite times until new line. But thats the point here. I am at a loss as to why this is happening. Ideas?

EDIT:

I open a text file and extract content between [ and ]. Add them to a list. Then for each group I try and do the above mentioned matching. Now I have tested this by manually entering the string as suggested and it works fine, but for an opened text not so much? Can It be that the opened text is messing up the new line?

 fileContents = File.ReadAllText(filename);

 source = Regex.Matches(fileContents, @".(?<=\[)[^\[\]]+(?=\]).").Cast<Match>().Select(match => match.Value).ToList();

 this.line = Regex.Matches(source, @".+(?<=\s(F|D|B|S|T))\d+.+").Cast<Match>().Select(match => match.Value).ToList();

                foreach (string item in this.line)

EDIT2: See answer.

Answer 1

Not the most elegant way to go around this I think, but just ended up going though the source line by line and looking up if its a match and if yes, append to the line.

  foreach (string line in source.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries)) { Regex regex = new Regex(@".+(?<=\\s(F|D|B|S|T))\\d+.+"); Match match = regex.Match(line); if (match.Success) Console.WriteLine(line + " text"); }