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ToUInt64 Method

# Decimal.ToUInt64 Method

.NET Framework 4.6 and 4.5

Converts the value of the specified Decimal to the equivalent 64-bit unsigned integer.

This API is not CLS-compliant.

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

## Syntax

```'Declaration
<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64 ( _
d As Decimal _
) As ULong
```

#### Parameters

d
Type: System.Decimal

The decimal number to convert.

#### Return Value

Type: System.UInt64
A 64-bit unsigned integer equivalent to the value of d.

## Exceptions

ExceptionCondition
OverflowException

d is negative or greater than UInt64.MaxValue.

## Remarks

The return value is the integral part of the decimal value; fractional digits are truncated.

## Examples

The following example uses the ToUInt64 method to convert decimal numbers to UInt64 values.

```Module Example
Public Sub Main()
Dim values() As Decimal = { 123d, New Decimal(123000, 0, 0, false, 3),
123.999d, 18446744073709551615.999d,
18446744073709551616d, 9223372036854775807.999d,
9223372036854775808d, -0.999d, -1d,
-9223372036854775808.999d,
-9223372036854775809d }

For Each value In values
Try
Dim number As ULong = Decimal.ToUInt64(value)
Console.WriteLine("{0} --> {1}", value, number)
Catch e As OverflowException
Console.WriteLine("{0}: {1}", e.GetType().Name, value)
End Try
Next
End Sub
End Module
' The example displays the following output:
'     123 --> 123
'     123.000 --> 123
'     123.999 --> 123
'     18446744073709551615.999 --> 18446744073709551615
'     OverflowException: 18446744073709551616
'     9223372036854775807.999 --> 9223372036854775807
'     9223372036854775808 --> 9223372036854775808
'     -0.999 --> 0
'     OverflowException: -1
'     OverflowException: -9223372036854775808.999
'     OverflowException: -9223372036854775809
```

## Version Information

#### .NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

#### .NET Framework Client Profile

Supported in: 4, 3.5 SP1

#### XNA Framework

Supported in: 3.0, 2.0, 1.0

#### .NET for Windows Phone apps

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

#### Portable Class Library

Supported in: Portable Class Library