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# Decimal.ToInt64 Method

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

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

## Syntax

```public static long ToInt64(
decimal d
)
```

#### Parameters

d
Type: System.Decimal
The Decimal value to convert.

#### Return Value

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

## Exceptions

ExceptionCondition
OverflowException

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

## Remarks

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

## Examples

The following code example converts Decimal numbers to Int64 values using the ToInt64 method.

```
// Example of the decimal.ToInt64 and decimal.ToUInt64 methods.
using System;

class Example
{
const string formatter = "{0,25}{1,22}{2,22}";

// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType(Exception ex)
{
string exceptionType = ex.GetType().ToString();
return exceptionType.Substring(
exceptionType.LastIndexOf('.') + 1);
}

// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int64(System.Windows.Controls.TextBlock outputBlock, decimal argument)
{
object Int64Value;
object UInt64Value;

// Convert the argument to a long value.
try
{
Int64Value = decimal.ToInt64(argument);
}
catch (Exception ex)
{
Int64Value = GetExceptionType(ex);
}

// Convert the argument to a ulong value.
try
{
UInt64Value = decimal.ToUInt64(argument);
}
catch (Exception ex)
{
UInt64Value = GetExceptionType(ex);
}

outputBlock.Text += String.Format(formatter, argument,
Int64Value, UInt64Value) + "\n";
}

public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
outputBlock.Text += String.Format("This example of the \n" +
"  decimal.ToInt64( decimal ) and \n" +
"  decimal.ToUInt64( decimal ) \nmethods " +
"generates the following output. It \ndisplays " +
"several converted decimal values.\n") + "\n";
outputBlock.Text += String.Format(formatter, "decimal argument",
"long/exception", "ulong/exception") + "\n";
outputBlock.Text += String.Format(formatter, "----------------",
"--------------", "---------------") + "\n";

// Convert decimal values and display the results.
DecimalToU_Int64(outputBlock, 123M);
DecimalToU_Int64(outputBlock, new decimal(123000, 0, 0, false, 3));
DecimalToU_Int64(outputBlock, 123.999M);
DecimalToU_Int64(outputBlock, 18446744073709551615.999M);
DecimalToU_Int64(outputBlock, 18446744073709551616M);
DecimalToU_Int64(outputBlock, 9223372036854775807.999M);
DecimalToU_Int64(outputBlock, 9223372036854775808M);
DecimalToU_Int64(outputBlock, -0.999M);
DecimalToU_Int64(outputBlock, -1M);
DecimalToU_Int64(outputBlock, -9223372036854775808.999M);
DecimalToU_Int64(outputBlock, -9223372036854775809M);
}
}

/*
This example of the
decimal.ToInt64( decimal ) and
decimal.ToUInt64( decimal )
methods generates the following output. It
displays several converted decimal values.

decimal argument        long/exception       ulong/exception
----------------        --------------       ---------------
123                   123                   123
123.000                   123                   123
123.999                   123                   123
18446744073709551615.999     OverflowException  18446744073709551615
18446744073709551616     OverflowException     OverflowException
9223372036854775807.999   9223372036854775807   9223372036854775807
9223372036854775808     OverflowException   9223372036854775808
-0.999                     0                     0
-1                    -1     OverflowException
-9223372036854775808.999  -9223372036854775808     OverflowException
-9223372036854775809     OverflowException     OverflowException
*/

```

## Version Information

#### Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone