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Jet Engine (Access) | Sql-Server                          | C#
--------------------+-------------------------------------+--------------------
Text (len < 256)    | char, nchar, varchar, nvarchar      | string
Memo                | text, ntext, the above with len>255 | string
Byte                | tinyint                             | byte
Integer             | smallint                            | short
Long Integer        | integer (int)                       | int
Single              | real                                | float
Double              | float                               | double
Replication ID      | uniqueidentifier                    | Guid
Decimal             | decimal                             | decimal
Date/Time           | smalldatetime, datetime, datetime2  | DateTime
Binary     (8 bytes)| timestamp, rowversion (Since V2008) | byte[]    (8 bytes)
Currency            | smallmoney, money                   | decimal
AutoNumber          | int + identity property             | int
Yes/No              | bit                                 | bool
OLE Object          | image                               | byte[]
Hyperlink           | <no equivalent>                     | string
<no equivalent>     | binary, varbinary                   | byte[]

I took this information from How to Migrate from Access to SQL Server 2000 and added the c# column.

我從如何從Access遷移到SQL Server 2000中獲取此信息並添加了c＃列。

Note also that most types are nullable in the databases. Map nullable columns to Nullable<T> (T?) in C# unless the .NET type is a reference type.

另請注意，大多數類型在數據庫中都可以為空。除非.NET類型是引用類型，否則將可空列映射到C＃中的Nullable （T？）。