Create txt file .net

IO Assembly: mscorlib in mscorlib. String The file to append the specified string to. String The string to append to the file. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Create a. Asked 9 years, 9 months ago. Active 7 months ago. Viewed k times. WriteLine "The very first line! WriteLine "The next line! Johnny Bueti 1 1 gold badge 7 7 silver badges 25 25 bronze badges.

Beware that almost all answers here are wrong and subject to race conditions. NET the solution is to use File. Open path, FileMode. Append, FileAccess. ReadWrite with appropriate flags. So it's not wrong here, it is the same process done manually. You may say unefficient but saying wrong doesn't count.

The difference is: File. Open internally delegates to a WinAPI function see next comment hopefully preventing the race condition. Most solutions here do not do this and are pretty obviously subject to race conditions. The existence check however is determined by FileMode. Append here.. Still saying wrong a little bit extreme, but you can say unefficient.

However if you can add an answer including all the definitions you wrote here and the reason why it is better that would help a lot as an answer and probably will be chosen as correct.

ComFreek I strongly agree that you should write a complete answer about it to explain it clearly. Comments are not for answering, and I'm sincerely curious about these race conditions and how you propose to solve it.

Show 1 more comment. Active Oldest Votes. Use the correct constructor : else if File. Daniel Hilgarth Daniel Hilgarth k 39 39 gold badges silver badges bronze badges. First answer, Most simple answer, Most usefull answer for me lol. When i looked at it i was like: Huh? How come i wont see that before? Peter Mortensen This code was really useful. Thanks RRPV — user Add a comment. Active Oldest Votes. Here is a single line that will create or overwrite the file: File.

Dispose Note: calling Dispose ensures that the reference to the file is closed. Sharky 5, 3 3 gold badges 38 38 silver badges 68 68 bronze badges. Schenz Schenz 1, 8 8 silver badges 14 14 bronze badges. Schenz: I know, lol, that's why i put in the sample. I imagined myself from ways back thinking: "Where the heck did filename come from? IO — Matt Ball. IO to the top of the class, or change example to System. Dispose — Schenz. Thanks for. Show 1 more comment. The path is read-only IOException.

The path name is Nothing ArgumentNullException. The path name is too long PathTooLongException. The path is invalid DirectoryNotFoundException. The path is only a colon ":" NotSupportedException. Awaits a call to File. WriteAllLinesAsync which:.

WriteAllTextAsync which:. There are additional conditions that may cause exceptions when working with the file system, it is best to program defensively. Skip to main content. This browser is no longer supported.