how to write to unix fifo in c#

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I am trying to write to linux fifo using both File.WriteAllText(string) as well as AppendAllText, this is what I get:

The code is simply

void Foo()
{
    File.AppendAllText("fifo", "blah");
}

file is "fifo" it was created using

mkfifo fifo

blah is random string I am trying to write there. I am getting this exception:

Unhandled Exception: System.NotSupportedException: The stream does not support seeking
  at System.IO.FileStream.Seek (Int64 offset, SeekOrigin origin) [0x00000] in <filename unknown>:0 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding, Int32 bufferSize) [0x00000] in <filename unknown>:0 
  at System.IO.StreamWriter..ctor (System.String path, Boolean append) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.StreamWriter:.ctor (string,bool)
  at System.IO.File.AppendAllText (System.String path, System.String contents) [0x00000] in <filename unknown>:0 
  at listener.User.InitialiseClient (System.Object data) [0x00000] in <filename unknown>:0 
  at System.Threading.Thread.StartInternal () [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.NotSupportedException: The stream does not support seeking
  at System.IO.FileStream.Seek (Int64 offset, SeekOrigin origin) [0x00000] in <filename unknown>:0 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding, Int32 bufferSize) [0x00000] in <filename unknown>:0 
  at System.IO.StreamWriter..ctor (System.String path, Boolean append) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.StreamWriter:.ctor (string,bool)
  at System.IO.File.AppendAllText (System.String path, System.String contents) [0x00000] in <filename unknown>:0 
  at listener.User.InitialiseClient (System.Object data) [0x00000] in <filename unknown>:0 
  at System.Threading.Thread.StartInternal () [0x00000] in <filename unknown>:0

the file was created using mkfifo, I can for example do echo test >> file but I would like to use c# function rather than calling external binary

mono c#
2 Answers
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