ToUInt64 Method

Decimal.ToUInt64 Method (Decimal)

.NET Framework 4.6 and 4.5

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

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

Syntax

```[CLSCompliantAttribute(false)]
public static ulong ToUInt64(
decimal d
)
```

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

Exception Condition
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.

```using System;

class Example
{
public static void Main( )
{
decimal[] values = { 123m, new Decimal(123000, 0, 0, false, 3),
123.999m, 18446744073709551615.999m,
18446744073709551616m, 9223372036854775807.999m,
9223372036854775808m, -0.999m, -1m,
-9223372036854775808.999m,
-9223372036854775809m };

foreach (var value in values) {
try {
ulong number = Decimal.ToUInt64(value);
Console.WriteLine("{0} --> {1}", value, number);
}
catch (OverflowException e)
{
Console.WriteLine("{0}: {1}", e.GetType().Name, value);
}
}
}
}
// 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

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1