Note

• OOXML has both non-generic methods and their non-generic methods. Ignore non-generic ones because you are interested in specific types in most cases.
• Use only AppendChild(...) rather than a mixture of PrependChild(...) and AppendChild(...)
• ParagraphProperties must come before Paragraph to take effect.
• RunProperties must come before Run to take effect.
• FirstLinecChars and HangingChars of the Indentation class are mutually exclusive.

Getter methods of OpenXmlElement

Method	Meaning
Descendants()	Get children, grandchildren and so on
Elements()	Get immediate children
GetFirstChild()	Get the first child

Setter methods of OpenXmlElement

Method	Meaning
PrependChild(T)	Prepend a child
AppendChild(T)	Append a child
Append(IEnumerable)	Append children
RemoveChild(T)	Remove a child
RemoveAllChildren()	Remove all children
ReplaceChild(OpenXmlElement, T)	Replace a child

OOXML (Office Open XML) vs Office Primary Interop Assembly (PIA)

Advantage of OOXML (Disadvantage of PIA)

• Create a Word/Excel using OOXML does not load pre-installed add-ins because OOXML just creates a text file (XML). Even if a pre-installed add-in is to crash, you can safely create a Word/Excel using OOXML.

Advantage of PIA (Disadvantage of OOXML)

• PIA offers properly structured building blocks of Excel/Word. If you combine building blocks of PIA in an incorrect structure, you can notice your mistake at a build time. In contrast, OOXML only offers building blocks of Excel/Word with no structure. Using OOXML, you never know at a build time whether building blocks you are combining is in the proper structure.