SqlBytes Represents a mutable reference type that wraps either a or a .

 SqlChars is a mutable reference type that wraps a array or a instance.

 SqlNullValueException The exception that is thrown when the Value property of a structure is set to null.

 SqlTruncateException The exception that is thrown when you set a value into a structure would truncate that value.

 SqlTypeException The base exception class for the .

 SqlXml Represents XML data stored in or retrieved from a server.

 SqlBinary Represents a variable-length stream of binary data to be stored in or retrieved from a database.

 SqlBoolean Represents an integer value that is either 1 or 0 to be stored in or retrieved from a database.

 SqlByte Represents an 8-bit unsigned integer, in the range of 0 through 255, to be stored in or retrieved from a database.

 SqlDateTime Represents the date and time data ranging in value from January 1, 1753 to December 31, 9999 to an accuracy of 3.33 milliseconds to be stored in or retrieved from a database. The structure has a different underlying data structure from its corresponding .NET Framework type, , which can represent any time between 12:00:00 AM 1/1/0001 and 11:59:59 PM 12/31/9999, to the accuracy of 100 nanoseconds. actually stores the relative difference to 00:00:00 AM 1/1/1900. Therefore, a conversion from "00:00:00 AM 1/1/1900" to an integer will return 0.

 SqlDecimal Represents a numeric value between - 10^38 +1 and 10^38 - 1, with fixed precision and scale.

 SqlDouble Represents a floating-point number within the range of -1.79E +308 through 1.79E +308 to be stored in or retrieved from a database.

 SqlGuid Represents a GUID to be stored in or retrieved from a database.

 SqlInt16 Represents a 16-bit signed integer to be stored in or retrieved from a database.

 SqlInt32 Represents a 32-bit signed integer to be stored in or retrieved from a database.

 SqlInt64 Represents a 64-bit signed integer to be stored in or retrieved from a database.

 SqlMoney Represents a currency value ranging from -2 63 (or -922,337,203,685,477.5808) to 2 63 -1 (or +922,337,203,685,477.5807) with an accuracy to a ten-thousandth of currency unit to be stored in or retrieved from a database.

 SqlSingle Represents a floating point number within the range of -3.40E +38 through 3.40E +38 to be stored in or retrieved from a database.

 SqlString Represents a variable-length stream of characters to be stored in or retrieved from the database. has a different underlying data structure from its corresponding .NET Framework data type.

 SqlCompareOptions Specifies the compare option values for a structure.

 INullable All the objects and structures implement the INullable interface.