ToString Method (IFormatProvider)

Int64.ToString Method (IFormatProvider)


Converts the numeric value of this instance to its equivalent string representation using the specified culture-specific format information.

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

public string ToString(
	IFormatProvider provider


Type: System.IFormatProvider

An IFormatProvider that supplies culture-specific formatting information.

Return Value

Type: System.String

The string representation of the value of this instance as specified by provider.

The ToString(IFormatProvider) method formats an Int64 value in the default ("G", or general) format by using the NumberFormatInfo object of a specified culture. If you want to specify a different format or the current culture, use the other overloads of the ToString method, as follows:

To use format

For culture

Use the overload

Default ("G") format

Default (current) culture


A specific format

Default (current) culture


A specific format

A specific culture

ToString(String, IFormatProvider)

The provider parameter is an object that implements the IFormatProvider interface. Its GetFormat method returns a NumberFormatInfo object that provides culture-specific information about the format of the string that is returned by this method. The object that implements IFormatProvider can be any of the following:

If provider is null or a NumberFormatInfo object cannot be obtained from provider, the return value is formatted with the NumberFormatInfo object for the current culture.

The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics:

The following example displays the string representation of an Int64 value using CultureInfo objects that represent several different cultures.

long value = -16325901;
// Display value using the invariant culture.
// Display value using the en-GB culture.
// Display value using the de-DE culture.
// This example displays the following output to the console:
//       -16325901
//       -16325901
//       -16325901

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top
© 2015 Microsoft