Decorator Pattern Code Review

class StreamDecorator : Stream { Stream m_stream; Int32 m_totalBytesRead = Int32.MinValue; Int32 m_numBytesToRead = Int32.MinValue; Int32 m_maxBytesToRead = 5; String m_readText = String.Empty;
public StreamDecorator(Stream s) { this.m_stream = s; this.m_totalBytesRead = 0; this.m_numBytesToRead = (Int32)s.Length; }
public override bool CanRead { get { return this.m_stream.CanRead; } } public override bool CanSeek { get { return this.m_stream.CanSeek; } } public override bool CanWrite { get { return this.m_stream.CanWrite; } } public override void Flush() { this.m_stream.Flush(); } public override long Length { get { return this.m_stream.Length; } } public override long Position { get { return this.m_stream.Position; } set { this.m_stream.Position = Position; } } public override int Read(byte[] buffer, int offset, int count) { return this.m_stream.Read(buffer, offset, count); } public override long Seek(long offset, SeekOrigin origin) { return this.m_stream.Seek(offset, origin); } public override void SetLength(long value) { this.m_stream.SetLength(value); } public override void Write(byte[] buffer, int offset, int count) { this.m_stream.Write(buffer, offset, count); }

public String ReadText { get { return this.m_readText; } } public Int32 MaxBytesToRead { get { return this.m_maxBytesToRead; } set { this.m_maxBytesToRead = value; } } public Int32 NumBytesToRead { get { return this.m_numBytesToRead; } } public Int32 TotalBytesRead { get { return this.m_totalBytesRead; } }
public int Read(byte[] buffer) { try { Int32 numBytesRead = Int32.MinValue; Int32 maxBytesToRead = this.m_maxBytesToRead; UTF7Encoding byteString = new UTF7Encoding();
if (this.m_numBytesToRead < maxBytesToRead) { maxBytesToRead = this.NumBytesToRead; }
numBytesRead = this.m_stream.Read(buffer, this.m_totalBytesRead, maxBytesToRead);
this.m_totalBytesRead += numBytesRead; this.m_numBytesToRead = ((Int32)this.Length) - this.m_totalBytesRead; this.m_readText = byteString.GetString(buffer); return m_numBytesToRead; } catch { throw; } } }