display text in textbox

[C# Programming]

i have developed a very simple application which contains a single win form and two classes.
i would like provide or show some text from those classess into my win textbox form.
how can i achieve it?
what I want excatly sames as "View Syn status" in MY SQL Replication.
i am trying to achieve from c#.

Abdul Rahaman Hamidy
Database Developer
Kabul, Afghanistan