MemoryStream Constructor (Byte[], Int32, Int32, Boolean)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Initializes a new non-resizable instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- buffer
- Type:
System.Byte
[]
The array of unsigned bytes from which to create this stream.
- index
- Type: System.Int32
The index in buffer at which the stream begins.
- count
- Type: System.Int32
The length of the stream in bytes.
- writable
- Type: System.Boolean
The setting of the CanWrite property, which determines whether the stream supports writing.
| Exception | Condition |
|---|---|
| ArgumentNullException | buffer is null. |
| ArgumentOutOfRangeException | index or count are negative. |
| ArgumentException | The buffer length minus index is less than count. |
The CanRead and CanSeek properties are both set to true. Capacity is set to count.
The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
This constructor does not expose the underlying stream. GetBuffer throws UnauthorizedAccessException. However, you can write to the stream if writable is true.
Version Notes
Windows Phone
System.ArgumentNullException is thrown when trying to retrieve a MemoryStream object with a size of zero bytes from a resource file. On Windows, no exception is thrown when the length is equal to zero.