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BinaryReaderReadUInt64 Method

Reads an 8-byte unsigned integer from the current stream and advances the position of the stream by eight bytes.

This API is not CLS-compliant.

Namespace:   System.IO
Assembly:  mscorlib (in mscorlib.dll)

public virtual ulong ReadUInt64()
virtual unsigned long long ReadUInt64()
abstract ReadUInt64 : unit -> uint64
override ReadUInt64 : unit -> uint64
Public Overridable Function ReadUInt64 As ULong

Return Value


An 8-byte unsigned integer read from this stream.

Exception Condition

The end of the stream is reached.


An I/O error occurs.


The stream is closed.

BinaryReader does not restore the file position after an unsuccessful read.

BinaryReader reads this data type in little-endian format.

For a list of common I/O tasks, see Common I-O Tasks.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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