Convert.ToInt64 Method (Int64)

Returns the specified 64-bit signed integer; no actual conversion is performed.

Namespace:  System
Assemblies:   System.Runtime.Extensions (in System.Runtime.Extensions.dll)
  mscorlib (in mscorlib.dll)

public static long ToInt64(
	long value
)

Parameters

value
Type: System.Int64

A 64-bit signed integer.

Return Value

Type: System.Int64
value is returned unchanged.

The following example converts each element in an array of integers to a long integer.

int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
long result;
foreach (int number in numbers)
{
   result = Convert.ToInt64(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                     number.GetType().Name, number,
                     result.GetType().Name, result);
}
// The example displays the following output: 
//    Converted the Int32 value -2147483648 to the Int64 value -2147483648. 
//    Converted the Int32 value -1 to the Int64 value -1. 
//    Converted the Int32 value 0 to the Int64 value 0. 
//    Converted the Int32 value 121 to the Int64 value 121. 
//    Converted the Int32 value 340 to the Int64 value 340. 
//    Converted the Int32 value 2147483647 to the Int64 value 2147483647.

.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

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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