MemoryStream Constructor (Byte[], Int32, Int32)
[ 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 (index) of a byte array.
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 into buffer at which the stream begins.
- count
- Type: System.Int32
The length of the stream in bytes.
| Exception | Condition |
|---|---|
| ArgumentNullException | buffer is null. |
| ArgumentOutOfRangeException | index or count is less than zero. |
| ArgumentException | The buffer length minus index is less than count. |
The CanRead, CanSeek, and CanWrite properties are all set to true, but the capacity cannot be changed. 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.
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.