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DateTimeFormatInfo.YearMonthPattern Property

Gets or sets the custom format string for a year and month value.

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

public string YearMonthPattern { get; set; }

Property Value

Type: System.String
The custom format string for a year and month value.

ExceptionCondition
ArgumentNullException

The property is being set to null.

InvalidOperationException

The property is being set and the DateTimeFormatInfo object is read-only.

The YearMonthPattern property defines the culture-specific format of date strings that are returned by calls to the DateTime.ToString and DateTimeOffset.ToString methods and by composite format strings that are supplied the "y" and "Y" standard format strings.

This property is affected if the value of the Calendar property changes.

We recommend that you set the date separator in the year month pattern to an exact string instead of using the date separator placeholder. For example, to get the pattern MM-yyyy, set the year month pattern to "MM-yyyy".

The following example displays the value of YearMonthPattern for a few cultures.

using System;
using System.Globalization;


public class SamplesDTFI  {

   public static void Main()  {

      // Displays the values of the pattern properties.
      Console.WriteLine( " CULTURE    PROPERTY VALUE" );
      PrintPattern( "en-US" );
      PrintPattern( "ja-JP" );
      PrintPattern( "fr-FR" );

   }

   public static void PrintPattern( String myCulture )  {

      DateTimeFormatInfo myDTFI = new CultureInfo( myCulture, false ).DateTimeFormat;
      Console.WriteLine( "  {0}     {1}", myCulture, myDTFI.YearMonthPattern );

   }

}

/*
This code produces the following output.  The question marks take the place of native script characters.

 CULTURE    PROPERTY VALUE
  en-US     MMMM, yyyy
  ja-JP     yyyy'?'M'?'
  fr-FR     MMMM yyyy

*/

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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