/// <summary>
/// Adds a ThumbnailPart to the WordprocessingDocument.
/// </summary>
/// <param name="partType">The type of the ThumbnailPart.</param>
/// <returns>The newly added ThumbnailPart.</returns>
public ThumbnailPart AddThumbnailPart(ThumbnailPartType partType)
{
string contentType = ThumbnailPartTypeInfo.GetContentType(partType);
string partExtension = ThumbnailPartTypeInfo.GetTargetExtension(partType);
PartExtensionProvider.MakeSurePartExtensionExist(contentType, partExtension);
return(AddThumbnailPart(contentType));
}
