The exception that is thrown when the operating system denies access because of an I/O error or a specific type of security error.
Assembly: mscorlib (in mscorlib.dll)
Initializes a new instance of theclass.
Initializes a new instance of theclass with serialized data.
Initializes a new instance of theclass with a specified error message.
Initializes a new instance of theclass with a specified error message and a reference to the inner exception that is the cause of this exception.
Gets a collection of key/value pairs that provide additional user-defined information about the exception.(Inherited from Exception.)
Gets or sets a link to the help file associated with this exception.(Inherited from Exception.)
Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.(Inherited from Exception.)
Gets a message that describes the current exception.(Inherited from Exception.)
Gets or sets the name of the application or the object that causes the error.(Inherited from Exception.)
Gets a string representation of the immediate frames on the call stack.(Inherited from Exception.)
Gets the method that throws the current exception.(Inherited from Exception.)
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
Gets the runtime type of the current instance.(Inherited from Exception.)
Creates and returns a string representation of the current exception.(Inherited from Exception.)
An Message property.exception is typically thrown by a method that wraps a Windows API call. To find the reasons for the exception, examine the text of the exception object's
uses the HRESULTCOR_E_UNAUTHORIZEDACCESS, which has the value 0x80070005.
The following example illustrates theexception that is thrown when attempting to write to a read-only file.
Imports System.IO Module Example Public Sub Main() Dim filePath As String = ".\ROFile.txt" If Not File.Exists(filePath) Then File.Create(filePath) ' Keep existing attributes, and set ReadOnly attribute. File.SetAttributes(filePath, (New FileInfo(filePath)).Attributes Or FileAttributes.ReadOnly) Dim sw As StreamWriter = Nothing Try sw = New StreamWriter(filePath) sw.Write("Test") Catch e As UnauthorizedAccessException Dim attr As FileAttributes = (New FileInfo(filePath)).Attributes Console.Write("UnAuthorizedAccessException: Unable to access file. ") If (attr And FileAttributes.ReadOnly) > 0 Then Console.Write("The file is read-only.") End If Finally If sw IsNot Nothing Then sw.Close() End Try End Sub End Module ' The example displays the following output: ' UnAuthorizedAccessException: Unable to access file. The file is read-only.
Available since 4.5
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 8.1
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.