I've used richtextbox a little bit, and well u can use richtextbox1.Select(7,12) (or whatever), but sometimes you wouldn't know where it ism so u could search the whole text thats in the richtextbox for the word your looking for,,,,and i wrote "Francais".Length, just incase its a variable, not a constant word...if it is u can use that or u can count it ur self ^^...lol
string retrieve_text = richTextBox1.SelectedText;
there might be another way...there might not,,,,,,but this should work
**how to solve invalid keystore error in android studio here is error report----------------------->
here is error report--------> error:Error:java.lang.RuntimeException: com.android.ide.common.signing.KeytoolException: Failed to read key palash from store "D:\MyApplication3.idea\workspace.xml": Invalid keystore format ...