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How do I set a GTC Duration in the .NET SDK?
To specify Good Till Cancelled for a store item, you need to assign the following properties of the item object:
item.ListingType = ListingTypeCodeType.FixedPriceItem;item.ListingDuration = ListingDurationCodeType.GTC;
The ListingDuration field is the number of days the listing will be active. See the documentation for valid duration for each of the listing types.
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