Equivalencias entre Tipos de Datos SQL SERVER 2008 y C#

SQL Server data type	CLR data type (SQL Server)	CLR data type (.NET Framework)
bigint	SqlInt64	Int64, Nullable
binary	SqlBytes, SqlBinary	Byte[]
bit	SqlBoolean	Boolean, Nullable
char	None	None
cursor	None	None
date	SqlDateTime	DateTime, Nullable
datetime	SqlDateTime	DateTime, Nullable
datetime2	SqlDateTime	DateTime, Nullable
DATETIMEOFFSET	None	DateTimeOffset, Nullable
decimal	SqlDecimal	Decimal, Nullable
float	SqlDouble	Double, Nullable
image	None	None
int	SqlInt32	Int32, Nullable
money	SqlMoney	Decimal, Nullable
nchar	SqlChars, SqlString	String, Char[]
ntext	None	None
numeric	SqlDecimal	Decimal, Nullable
nvarchar	SqlChars, SqlString SQLChars is a better match for data transfer and access, andSQLString is a better match for performing String operations.	String, Char[]
nvarchar(1), nchar(1)	SqlChars, SqlString	Char, String, Char[], Nullable
real	SqlSingle	Single, Nullable
rowversion	None	Byte[]
smallint	SqlInt16	Int16, Nullable
smallmoney	SqlMoney	Decimal, Nullable
sql_variant	None	Object
table	None	None
text	None	None
time	TimeSpan	TimeSpan, Nullable
timestamp	None	None
tinyint	SqlByte	Byte, Nullable
uniqueidentifier	SqlGuid	Guid, Nullable
User-defined type(UDT)	None	The same class that is bound to the user-defined type in the same assembly or a dependent assembly.
varbinary	SqlBytes, SqlBinary	Byte[]
varbinary(1), binary(1)	SqlBytes, SqlBinary	byte, Byte[], Nullable
varchar	None	None
xml	SqlXml	None