The table below contains type mapping rules that are used to map Zoho Books field types to .NET types.

Zoho Books Native Data Type	Provider Data Type	.NET Data Type
"Text"	STRING	String
"AutoNumber"	STRING	String
"Integer"	INT	Int32
"LongInteger"	LONG	Int64
"Decimal"	DECIMAL	Decimal
"Percent"	STRING	String
"Currency"	DOUBLE	Double
"Double"	DOUBLE	Double
"Date"	DATE	DateTime
"DateTime"	DATETIME	DateTime
"Email"	STRING	String
"Phone"	STRING	String
"Pick List"	STRING	String
"Multiselect Pick List"	STRING	String
"URL"	STRING	String
"TextArea"	STRING	String
"CheckBox"	BOOLEAN	Boolean
"Boolean"	BOOLEAN	Boolean
"OwnerLookup"	STRING	String
"Lookup"	STRING	String
"Website"	STRING	String
"BigInt"	LONG	Int64
"Formula"	STRING	String