The table below contains type mapping rules that are used to map Dynamics 365 field types to .NET types.

Dynamics 365 Native Data Type	Provider Data Type	.NET Data Type
Integer	INT	Int32
BigInt	LONG	Int64
Decimal	DECIMAL	Decimal
Double	DOUBLE	Double
String	STRING	String
Boolean	BOOLEAN	Boolean
DateTime	DATETIME	DateTime
Customer	GUID	Guid
Lookup	GUID	Guid
Memo	STRING	String
Money	DECIMAL	Decimal
Owner	GUID	Guid
PartyList	STRING	String
Picklist	STRING	String
State	STRING	String
Status	STRING	String
Uniqueidentifier	GUID	Guid
CalendarRules	STRING	String
ManagedProperty	STRING	String
EntityName	STRING	String