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# Decimal.ToInt64 Method

.NET Framework 4

Updated: May 2012

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

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
```'Declaration
Public Shared Function ToInt64 ( _
d As Decimal _
) As Long
```

#### Parameters

d
Type: System.Decimal
The decimal number to convert.

#### Return Value

Type: System.Int64
A 64-bit signed integer equivalent to the value of d.
ExceptionCondition
OverflowException

d is less than Int64.MinValue or greater than Int64.MaxValue.

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

The following example uses the ToInt64 method to convert decimal numbers to Int64 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 Long = Decimal.ToInt64(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
'   OverflowException: 18446744073709551615.999
'   OverflowException: 18446744073709551616
'   9223372036854775807.999 --> 9223372036854775807
'   OverflowException: 9223372036854775808
'   -0.999 --> 0
'   -1 --> -1
'   -9223372036854775808.999 --> -9223372036854775808
'   OverflowException: -9223372036854775809

```

#### .NET Framework

Supported in: 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

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

#### Reference

Date

History

Reason

May 2012

Replaced the example.

Customer feedback.