Free online app to <strong>C</strong>onvert RTF to XLSB files. .NET <strong>C</strong># <strong>C</strong>onversion library <strong>C</strong>ode for RTF do<strong>C</strong>uments....SaveFormat Convert RTF to XLSB via C# .NET Few more cases for saving...Stream via C#, Add Custom Properties in XLSB File via C#. Develop...