Marshal.PtrToStringUni Method (IntPtr, Int32)

This type can be used only by trusted applications. If you try to use its members in a partial-trust application, your code will throw a MethodAccessException exception. This type is security-critical, which restricts its use.


Copies a specified number of characters from a Unicode string stored in native heap to a managed String.

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


<SecurityCriticalAttribute> _
Public Shared Function PtrToStringUni ( _
    ptr As IntPtr, _
    len As Integer _
) As String
public static string PtrToStringUni(
    IntPtr ptr,
    int len


  • ptr
    Type: System.IntPtr
    The address of the first character of the unmanaged string.
  • len
    Type: System.Int32
    The number of Unicode characters to copy.

Return Value

Type: System.String
A managed string that holds a copy of the native string if the value of the ptr parameter is not nulla null reference (Nothing in Visual Basic); otherwise, this method returns nulla null reference (Nothing in Visual Basic).

Version Information


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0


For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.