var updates = new List<BoxMetadataTemplateUpdate>(){ new BoxMetadataTemplateUpdate() { Op = MetadataTemplateUpdateOp.addEnumOption, FieldKey = "fy", Data = new { key = "FY20" } }, new BoxMetadataTemplateUpdate() { Op = MetadataTemplateUpdateOp.editTemplate, Data = new { hidden = false } }};BoxMetadataTemplate updatedTemplate = await client.MetadataManager .UpdateMetadataTemplate(updates, "enterprise", "marketingCollateral");