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Returns the zero-based index of the first occurrence of the value in the collection or part of it.
public int IndexOf(Bookmark value)
| Type | Name | Description |
|---|---|---|
| Bookmark | value | Object to search for in the collection. |
| Type | Description |
|---|---|
| int | Index (zero-based) of the first occurrence of the item parameter if it is found in the collection; otherwise -1. |