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Editorial Team
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Asked: 2026-05-11T19:39:09+00:00

For the following SQL Server datatypes, what would be the corresponding datatype in C#?

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For the following SQL Server datatypes, what would be the corresponding datatype in C#?

Exact Numerics

bigint
numeric
bit
smallint
decimal
smallmoney
int
tinyint
money

Approximate Numerics

float
real

Date and Time

date
datetimeoffset
datetime2
smalldatetime
datetime
time

Character Strings

char
varchar
text

Unicode Character Strings

nchar
nvarchar
ntext

Binary Strings

binary
varbinary
image

Other Data Types

cursor
timestamp
hierarchyid
uniqueidentifier
sql_variant
xml
table

(source: MSDN)

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1 Answer

  1. Editorial Team

    This is for SQL Server 2005. There are updated versions of the table for SQL Server 2008, SQL Server 2008 R2, SQL Server 2012 and SQL Server 2014.

    SQL Server Data Types and Their .NET Framework Equivalents

    The following table lists Microsoft SQL Server data types, their equivalents in the common language runtime (CLR) for SQL Server in the System.Data.SqlTypes namespace, and their native CLR equivalents in the Microsoft .NET Framework.

    SQL Server data type CLR data type (SQL Server) CLR data type (.NET Framework)
    varbinary SqlBytes, SqlBinary Byte[]
    binary SqlBytes, SqlBinary Byte[]
    varbinary(1), binary(1) SqlBytes, SqlBinary byte, Byte[]
    image None None
    varchar None None
    char None None
    nvarchar(1), nchar(1) SqlChars, SqlString Char, String, Char[]
    nvarchar SqlChars, SqlString String, Char[]
    nchar SqlChars, SqlString String, Char[]
    text None None
    ntext None None
    uniqueidentifier SqlGuid Guid
    rowversion None Byte[]
    bit SqlBoolean Boolean
    tinyint SqlByte Byte
    smallint SqlInt16 Int16
    int SqlInt32 Int32
    bigint SqlInt64 Int64
    smallmoney SqlMoney Decimal
    money SqlMoney Decimal
    numeric SqlDecimal Decimal
    decimal SqlDecimal Decimal
    real SqlSingle Single
    float SqlDouble Double
    smalldatetime SqlDateTime DateTime
    datetime SqlDateTime DateTime
    sql_variant None Object
    User-defined type(UDT) None user-defined type
    table None None
    cursor None None
    timestamp None None
    xml SqlXml None
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