CultureInfo.ReadOnly Method
Returns a read-only wrapper around the specified CultureInfo.
Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)
Parameters
- ci
- Type: System.Globalization.CultureInfo
The CultureInfo to wrap.
| Exception | Condition |
|---|---|
| ArgumentNullException | ci is null. |
This wrapper prevents any modifications to ci, or the objects returned by the ci.DateTimeFormat and ci.NumberFormat properties.
The following code example shows that the ReadOnly method helps protect the DateTimeFormatInfo and NumberFormatInfo instances associated with the CultureInfo.
using System; using System.Globalization; public class SamplesCultureInfo { public static void Main() { // Creates a CultureInfo. CultureInfo myCI = new 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 ? "read only" : "writable" ); Console.WriteLine( "myCI.DateTimeFormat is {0}.", myCI.DateTimeFormat.IsReadOnly ? "read only" : "writable" ); Console.WriteLine( "myCI.NumberFormat is {0}.", myCI.NumberFormat.IsReadOnly ? "read only" : "writable" ); Console.WriteLine( "myReadOnlyCI is {0}.", myReadOnlyCI.IsReadOnly ? "read only" : "writable" ); Console.WriteLine( "myReadOnlyCI.DateTimeFormat is {0}.", myReadOnlyCI.DateTimeFormat.IsReadOnly ? "read only" : "writable" ); Console.WriteLine( "myReadOnlyCI.NumberFormat is {0}.", myReadOnlyCI.NumberFormat.IsReadOnly ? "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. */
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.