Hi V N,
The problem is caused by the format itself. The "." in the format is accepted as decimal separator, which will cause the toString() method to fall in infinitive loop. Currently the literals and excaping functionality is not supported. We will give all our best to provide some of the required features in order to support such format. For now I will suggest you to not use "." in the format as a literal.
As a gratitude for poiting this issue I have updated your Telerik points.
the Telerik team
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