SQL2005中的字段类型对应C#的变量类型
| 数据库 | C#程序 |
| int | int32 |
| text | string |
| bigint | int64 |
| binary | System.Byte[] |
| bit | Boolean |
| char | string |
| datetime | System.DateTime |
| decimal | System.Decimal |
| float | System.Double |
| image | System.Byte[] |
| money | System.Decimal |
| nchar | String |
| ntext | String |
| numeric | System.Decimal |
| nvarchar | String |
| real | System.Single |
| smalldatetime | System.DateTime |
| smallint | Int16 |
| smallmoney | System.Decimal |
| timestamp | System.DateTime |
| tinyint | System.Byte |
| varbinary | System.Byte[] |
| varchar | String |
| Variant | Object |
| unique identifier | System.Guid |
