In the latest Aspose Words .NET an error ‘A value with the specified key has already been added’ occurs when applying InsertAfter method multiple times into a single placeholder in a document. The error does not occur in an earlier 2020.01 release. This behavior is demonstrated in a sample code & documents where a table rowset is inserted into a table in a parent document.
AsposeTableRowInsert.zip (87.1 KB)
We have tested the scenario and managed to reproduce the same issue at our side. We have logged this problem in our issue tracking system as WORDSNET-21233 . You will be notified via this forum thread once this issue is resolved.
We apologize for your inconvenience.
The issues you have found earlier (filed as WORDSNET-21233) have been fixed in this Aspose.Words for .NET 20.11 update and this Aspose.Words for Java 20.11 update.