Here is what you
should not do: do not calculate new text for the instance of
RichTextBox and do not assign it to the property
Text. Do not try to do something like that with the property
Rtf. (This is applicable to
System.Windows.Forms.RichTextBox only, you cannot do it for WPF
System.Windows.Controls.RichTextBox.)
Here is what you
should do: select the text you need using the properly
SelectionStart and
SelectionEnd, then assign the property
SelectedText to
string.Empty.
Also, pay attention: these controls have Undo functionality; you can use it.
See:
http://msdn.microsoft.com/en-us/library/system.windows.forms.richtextbox.aspx[
^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.richtextbox.aspx[
^].
Please,
always tag UI library you want to use, don't make experts doing double work!
—SA
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