c# - Using .NET GZipStream Class with Mono -

i'm trying build example gzipstream class. command gmcs gzip.cs, got error messages. gzip.cs same source msdn.

it seems need add reference when compiling. what's missing?

gzip.cs(57,32): error cs1061: type `system.io.filestream' not contain definition `copyto' , no extension method `copyto' of type `system.io.filestream' found (are missing using directive or assembly reference?) /library/frameworks/mono.framework/versions/2.10.1/lib/mono/2.0/mscorlib.dll (location of symbol related previous error) gzip.cs(86,40): error cs1061: type `system.io.compression.gzipstream' not contain definition `copyto' , no extension method `copyto' of type `system.io.compression.gzipstream' found (are missing using directive or assembly reference?) /library/frameworks/mono.framework/versions/2.10.1/lib/mono/gac/system/2.0.0.0__b77a5c561934e089/system.dll (location of symbol related previous error) compilation failed: 2 error(s), 0 warnings 

solved

i should use 'dmcs', not 'gmcs' in order use .net 4 functions.

stream.copyto arrived in .net 4 - may not in mono yet (or perhaps need more recent version).

it's easy write similar extension method though:

public static class streamextensions {     public static void copyto(this stream input, stream output)     {         byte[] buffer = new byte[16 * 1024];         int bytesread;         while ((bytesread = input.read(buffer, 0, buffer.length)) > 0)         {             output.write(buffer, 0, bytesread);         }     } }