You can call this operation to delete a Searchindex structure. The sample code is as follows:

/// <summary>
/// Delete a Searchindex structure.
/// </summary>
/// <param name="otsClient"></param>
public static void DeleteSearchIndex(OTSClient otsClient)
    // Set the table name and index name.
    DeleteSearchIndexRequest request = new DeleteSearchIndexRequest(TableName, IndexName);
    // Call the OTSClient to delete the target Searchindex structure.
    DeleteSearchIndexResponse response = otsClient.DeleteSearchIndex(request);