It's a bit hacky, but you could subclass the control you want and override the Text property:
public class MyTest : Button
{
public override string Text
{
get
{
return @"test";
}
set
{
}
}
}
This shows up in the designer, but when you try and change it Visual Studio just ignores you. You probably want to do something other than just return a hardcoded string literal, but I'm sure you get the idea :-)