STREAM
The Stream class defines properties and methods that derived stream classes must provide. These let the program perform relatively generic tasks with streams such as determining whether the stream allows writing.
The following table describes the Stream class’s most useful properties:
| PROPERTY | PURPOSE |
| CanRead | Returns True if the stream supports reading. |
| CanSeek | Returns True if the stream supports seeking to a particular position in the stream. |
| CanTimeout | Returns True if the stream supports timing out of read and write operations. |
| CanWrite | Returns True if the stream supports writing. |
| Length | Returns the number of bytes in the stream. |
| Position | Returns the stream’s current position in its bytes. For a stream that supports seeking, the program can set this value to move to a particular position. |
| ReadTimeout | Determines the number of milliseconds that a read operation will wait before timing out. |
| WriteTimeout | Determines the number of milliseconds that a write operation will wait before timing out. |
The following table describes the Stream class’s most useful methods:
| METHOD | PURPOSE |
| BeginRead | Begins an asynchronous read. |
| BeginWrite | Begins an asynchronous write. |
| Close | Closes the stream and releases any resources it uses (such as file handles). |
| EndRead | Waits for an asynchronous read to finish. |
| EndWrite | Ends an asynchronous write. |
| Flush | Flushes data from the stream’s buffers into the underlying storage medium (device, file, memory, and so forth). |
| Read | Reads bytes from the stream and advances its position by that number of bytes. |
| ReadByte | Reads a byte from the stream and advances its position by one byte. |
| Seek | If the stream supports seeking, sets the stream’s position. |
| SetLength | Sets the stream’s length. If the stream is currently longer than the new length, it is truncated. If the stream is shorter than the new length, it is enlarged. The stream must support both writing and seeking for this method to work. |
| Write | Writes bytes into the stream and advances the current position by this number of bytes. |
| WriteByte | Writes one byte into the stream and advances the current position by one byte. |
You can learn about the other members of the Stream class at http://msdn.microsoft.com/system.io.stream.aspx.
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