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CultureInfo::IsReadOnly Property

Gets a value indicating whether the current CultureInfo is read-only.

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

property bool IsReadOnly {
	bool get ();

Property Value

Type: System::Boolean
true if the current CultureInfo is read-only; otherwise, false. The default is false.

If the CultureInfo is read-only, the DateTimeFormat and NumberFormat instances are also read-only.

The following code example shows that IsReadOnly also helps protect the DateTimeFormatInfo and NumberFormatInfo instances associated with the CultureInfo.

using namespace System;
using namespace System::Globalization;
int main()

   // Creates a CultureInfo.
   CultureInfo^ myCI = gcnew CultureInfo( "en-US" );

   // Creates a read-only CultureInfo based on myCI -> 
   CultureInfo^ myReadOnlyCI = CultureInfo::ReadOnly( myCI );

   // Display the read-only status of each CultureInfo and their DateTimeFormat and NumberFormat properties.
   Console::WriteLine( "myCI is {0}.", myCI->IsReadOnly ? (String^)"read only" : "writable" );
   Console::WriteLine( "myCI -> DateTimeFormat is {0}.", myCI->DateTimeFormat->IsReadOnly ? (String^)"read only" : "writable" );
   Console::WriteLine( "myCI -> NumberFormat is {0}.", myCI->NumberFormat->IsReadOnly ? (String^)"read only" : "writable" );
   Console::WriteLine( "myReadOnlyCI is {0}.", myReadOnlyCI->IsReadOnly ? (String^)"read only" : "writable" );
   Console::WriteLine( "myReadOnlyCI -> DateTimeFormat is {0}.", myReadOnlyCI->DateTimeFormat->IsReadOnly ? (String^)"read only" : "writable" );
   Console::WriteLine( "myReadOnlyCI -> NumberFormat is {0}.", myReadOnlyCI->NumberFormat->IsReadOnly ? (String^)"read only" : "writable" );

This code produces the following output.

myCI is writable.
myCI -> DateTimeFormat is writable.
myCI -> NumberFormat is writable.
myReadOnlyCI is read only.
myReadOnlyCI -> DateTimeFormat is read only.
myReadOnlyCI -> NumberFormat is read only.

.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.