I've used this demo and seems working fine. The only trouble is I am not able to add word to custom dictionary. I've 'en-US-custom.txt' file under ~/App_Data/RadSpell folder. I also tried explicitly setting the value for DictionaryPath and CustomDictionarySuffix properties like below:
<telerik:RadSpell ID="RadSpell1" runat="server"
ControlsToCheck="TextBox1" DictionaryPath="~/App_Data/RadSpell/" CustomDictionarySuffix="-custom"
SpellCheckProviderTypeName="Telerik.Web.UI.NHunSpellCheckProvider, App_Code" />
<asp:TextBox ID="TextBox1" runat="server" Width="200">samplle misstaken kontent</asp:TextBox>
while adding custom word i am getting Server Error:500 "No dictionary loaded.Set the DictionaryPath property from the spell checker settings or copy the dictionaries to ~/App_Data/RadSpell/"
Will you please suggest what should be done to resolve this?
P.S i've used same project which was given for demo.