Well, there is a problem with config_file.write(info);
but when I'm changing it to write("Data/config.ini", info);(as it states in http://dlang.org/phobos/std_file.html#.write) I'm getting an error of conflict between std.stdio.write and std.file.write. That's why I was using the first line.
Is there any way to solve this problem? Best regards, Ironus