I am building a String and the code looks like
String status = "The status of my combobox is " + comboBoxTest.SelectedText
I am using WinForm in VS2010
The result looks like
"The status of my combobox is "
I think you want to use
String status = "The status of my combobox is " + comboBoxTest.Text
SelectedText property from MSDN
Gets or sets the text that is selected in the editable portion of a ComboBox.
while Text property from MSDN
Gets or sets the text associated with this control.