textbox in c# (wp7) in 1 line
===

I have problem with 2 Textblocks in my WP7 project (in expression blend).

I put them [text block][text block] in a grid, and the problem is that text of 1st text block is random, once got 5 char, once 10 char, and first text block is on second text block.  

example:

[First Text][Second Text]
[First Text Dadada] Text]

I would like to make them:
[First Text][Second Text]
[First Text Dadadda][Second Text]