Begin, Rescue and Ensure in Ruby?

I was wondering if ensure was the Ruby equivalent of finally in C#? Should I have:

file = File.open("myFile.txt", "w")begin  file << "#{content} \n"rescue  # handle the error hereensure  file.close unless file.nil?end

or should I do this?

#store the filefile = File.open("myFile.txt", "w")begin  file << "#{content} \n"  file.closerescue  # handle the error hereensure  file.close unless file.nil?end

Does ensure get called no matter what even if an exception isn't raised?