ArcGIS Pro 2.9 API Reference Guide
DeleteMetadataContent Method (IMetadata)
Example 

ArcGIS.Desktop.Core Namespace > IMetadata Interface : DeleteMetadataContent Method
Delete certain content from the metadata of the current item
Syntax
void DeleteMetadataContent( 
   MDDeleteContentOption deleteOption
)
Sub DeleteMetadataContent( _
   ByVal deleteOption As MDDeleteContentOption _
) 

Parameters

deleteOption

Return Value

void
Example
Item featureClassWithMetadataItem = ItemFactory.Instance.Create(@"C:\projectBeta\GDBs\regionFive.gdb\SourceFeatureClass");
//Delete thumbnail content from item's metadata
await QueuedTask.Run(() => featureClassWithMetadataItem.DeleteMetadataContent(MDDeleteContentOption.esriMDDeleteThumbnail));
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

See Also

Reference

IMetadata Interface
IMetadata Members