File.ReadAllBytesAsync(String, CancellationToken) Method
Definition
Important
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Asynchronously opens a binary file, reads the contents of the file into a byte array, and then closes the file.
public static System.Threading.Tasks.Task<byte[]> ReadAllBytesAsync (string path, System.Threading.CancellationToken cancellationToken = default);static member ReadAllBytesAsync : string * System.Threading.CancellationToken -> System.Threading.Tasks.Task<byte[]>Public Shared Function ReadAllBytesAsync (path As String, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Byte())Parameters
- path
- String
The file to open for reading.
- cancellationToken
- CancellationToken
The token to monitor for cancellation requests. The default value is None.
Returns
A task that represents the asynchronous read operation, which wraps the byte array containing the contents of the file.
Exceptions
The cancellation token was canceled. This exception is stored into the returned task.
Remarks
This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by ReadAllBytes(String).
