SecureString Constructor
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SecureString Constructor ()

 

Initializes a new instance of the SecureString class.

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

Public Sub New

Exception Condition
CryptographicException

An error occurred while protecting or unprotecting the value of this instance.

NotSupportedException

This operation is not supported on this platform.

Win2kFamily

SecureString is only supported on Windows 2000 Service Pack 3 and later.

The following example uses the default (or parameterless) constructor to instantiate a new SecureString object. It then calls the AppendChar method to add an array of characters to it.

Imports System.Security

Module Example
   Public Sub Main()
      ' Define the string value to assign to a new secure string.
      Dim chars() As Char = { "t"c, "e"c, "s"c, "t"c }
      ' Instantiate the secure string.
      Dim testString As SecureString = New SecureString()
      ' Assign the character array to the secure string.
      For Each ch As char In chars
         testString.AppendChar(ch)
      Next         
      ' Display secure string length.
      Console.WriteLine("The length of the string is {0} characters.", _ 
                        testString.Length)
      testString.Dispose()
   End Sub
End Module
' The example displays the following output:
'      The length of the string is 4 characters.

The following example creates a SecureString object from the value of a String object.

Imports System.Security

Module Example
   Public Sub Main()
      ' Define the string value to be assigned to the secure string.
      Dim initString As String = "TestString"
      ' Instantiate the secure string.
      Dim testString As SecureString = New SecureString()
      ' Use the AppendChar method to add each char value to the secure string.
      For Each ch As Char In initString
         testString.AppendChar(ch)
      Next   
      ' Display secure string length.
      Console.WriteLine("The length of the string is {0} characters.", _ 
                        testString.Length)
      testString.Dispose()
   End Sub
End Module
' The example displays the following output:
'      The length of the string is 10 characters.

.NET Framework
Available since 2.0
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