FIX. RadSpellChecker - single letter in parentheses is underlined with a red line when use spell as you type in the RadTextBoxControl
1. Add RadTextBoxControl and RadSpellChecker
2. Set the AutoSpellCheckControl property to radTextBoxControl1
3. Type text "(a) is (b) is (c) (d)" and you will see that the letters in parentheses are underline like incorrect.