C# string strText = "";
Java String strText = "";
Like I said, tiny syntax differences.
Then there are the views...
layout_main.xml contains TextView tvText
You are on mainActivity
TextView tvText = (TextView)findViewById(R.id.tvText);
Now, mainActivity.tvText is a pointer to the textview in your layout, and you can manipulate it.
Naturally, in C#, the textview would just be a part of the form you are coding, and you could have skipped that step.
By the way - If you are starting Android programming - I highly recommend you start by learning the layout xmls. They can be tricky, and took me a little while to learn. The code portion wasn't so bad, and Eclipse of course made it that much easier (with the imports and what not)
Once you learn those (and this is really important), make sure you read about the Android lifecycle. If you don't have things like your onPause, onDestroy, onResume, all that - you could end up with a program that never actually closes (I did that once by accident... it ate my battery up bad)
EDIT: lol, I just noticed the age of this thread... *kicks a dead horse*... either way, I'm leaving this post here, others may be looking for the same info