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A validation error occurs when selecting a value in the dropdown list, which happens when the index property is bound and the data source is set as a string array.
Replication Procedure:
Sample : https://www.syncfusion.com/downloads/support/common/4386/ze/TestDropDownCustomControls_a6cfb6f5.zip
Current Behavior : ‘e-error’ class is added on the component when we select the value in dropdownlist
Expected Behavior : Validation should occurs properly