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UInt64 Structure

Represents a 64-bit unsigned integer.

This API is not CLS-compliant. The CLS-compliant alternative is Decimal.

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

[SerializableAttribute]
[CLSCompliantAttribute(false)]
[ComVisibleAttribute(true)]
public struct UInt64 : IComparable, IFormattable, 
	IConvertible, IComparable<ulong>, IEquatable<ulong>

The UInt64 type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkCompareTo(Object)Compares this instance to a specified object and returns an indication of their relative values.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsCompareTo(UInt64)Compares this instance to a specified 64-bit unsigned integer and returns an indication of their relative values.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsEquals(Object)Returns a value indicating whether this instance is equal to a specified object. (Overrides ValueType.Equals(Object).)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsEquals(UInt64)Returns a value indicating whether this instance is equal to a specified UInt64 value.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetHashCodeReturns the hash code for this instance. (Overrides ValueType.GetHashCode().)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetTypeCodeReturns the TypeCode for value type UInt64.
Public methodStatic memberSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsParse(String)Converts the string representation of a number to its 64-bit unsigned integer equivalent.
Public methodStatic memberSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsParse(String, NumberStyles)Converts the string representation of a number in a specified style to its 64-bit unsigned integer equivalent.
Public methodStatic memberSupported by Portable Class LibrarySupported in .NET for Windows Store appsParse(String, IFormatProvider)Converts the string representation of a number in a specified culture-specific format to its 64-bit unsigned integer equivalent.
Public methodStatic memberSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsParse(String, NumberStyles, IFormatProvider)Converts the string representation of a number in a specified style and culture-specific format to its 64-bit unsigned integer equivalent.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToString()Converts the numeric value of this instance to its equivalent string representation. (Overrides ValueType.ToString().)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToString(IFormatProvider)Converts the numeric value of this instance to its equivalent string representation using the specified culture-specific format information.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToString(String)Converts the numeric value of this instance to its equivalent string representation using the specified format.
Public methodSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsToString(String, IFormatProvider)Converts the numeric value of this instance to its equivalent string representation using the specified format and culture-specific format information.
Public methodStatic memberSupported by Portable Class LibrarySupported in .NET for Windows Store appsTryParse(String, UInt64)Tries to convert the string representation of a number to its 64-bit unsigned integer equivalent. A return value indicates whether the conversion succeeded or failed.
Public methodStatic memberSupported by Portable Class LibrarySupported in .NET for Windows Store appsTryParse(String, NumberStyles, IFormatProvider, UInt64)Tries to convert the string representation of a number in a specified style and culture-specific format to its 64-bit unsigned integer equivalent. A return value indicates whether the conversion succeeded or failed.
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  NameDescription
Public fieldStatic memberSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsMaxValueRepresents the largest possible value of UInt64. This field is constant.
Public fieldStatic memberSupported by the XNA FrameworkSupported by Portable Class LibrarySupported in .NET for Windows Store appsMinValueRepresents the smallest possible value of UInt64. This field is constant.
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  NameDescription
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIComparable.CompareToCompares the current instance with another object of the same type and returns an integer that indicates whether the current instance precedes, follows, or occurs in the same position in the sort order as the other object.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToBooleanInfrastructure. For a description of this member, see IConvertible.ToBoolean.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToByteInfrastructure. For a description of this member, see IConvertible.ToByte.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToCharInfrastructure. For a description of this member, see IConvertible.ToChar.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToDateTimeInfrastructure. This conversion is not supported. Attempting to use this method throws an InvalidCastException.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToDecimalInfrastructure. For a description of this member, see IConvertible.ToDecimal.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToDoubleInfrastructure. For a description of this member, see IConvertible.ToDouble.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToInt16Infrastructure. For a description of this member, see IConvertible.ToInt16.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToInt32Infrastructure. For a description of this member, see IConvertible.ToInt32.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToInt64Infrastructure. For a description of this member, see IConvertible.ToInt64.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToSByteInfrastructure. For a description of this member, see IConvertible.ToSByte.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToSingleInfrastructure. For a description of this member, see IConvertible.ToSingle.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToTypeInfrastructure. For a description of this member, see IConvertible.ToType.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToUInt16Infrastructure. For a description of this member, see IConvertible.ToUInt16.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToUInt32Infrastructure. For a description of this member, see IConvertible.ToUInt32.
Explicit interface implemetationPrivate methodSupported by the XNA FrameworkIConvertible.ToUInt64Infrastructure. For a description of this member, see IConvertible.ToUInt64.
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The UInt64 value type represents unsigned integers with values ranging from 0 to 18,446,744,073,709,551,615.

Important noteImportant

   The UInt64 type is not CLS-compliant. The CLS-compliant alternative type is Decimal. Int64 can be used instead to replace a UInt64 value that ranges from zero to MaxValue. For more information about CLS compliance, see Language Independence and Language-Independent Components.

UInt64 provides methods to compare instances of this type, convert the value of an instance to its string representation, and convert the string representation of a number to an instance of this type.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

All members of this type are thread safe. Members that appear to modify instance state actually return a new instance initialized with the new value. As with any other type, reading and writing to a shared variable that contains an instance of this type must be protected by a lock to guarantee thread safety.

Caution noteCaution

Assigning an instance of this type is not thread safe on all hardware platforms because the binary representation of that instance might be too large to assign in a single atomic operation.

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