public void Write (long offset, char [] buffer, int offsetInBuffer, int count)
		{
			if (count > this.MaxLength || ((count + offset) > this.MaxLength) ||
			    count > buffer.Length || count < 0 || 
			    ((offsetInBuffer + count) > buffer.Length))
				throw new SqlTypeException ("The buffer is insufficient. Read or write operation failed.");
			
			if (offset < 0 || offset > MaxLength)
				throw new SqlTypeException ("The buffer is insufficient. Read or write operation failed.");
			
			if (offsetInBuffer < 0 || offsetInBuffer > buffer.Length ||
			    offsetInBuffer > this.Length)
				throw new ArgumentOutOfRangeException ("offsetInBuffer");
			
			if (this.IsNull)
				throw new SqlTypeException ("There is no buffer. Read or write operation failed.");
				
			if (buffer == null)
				throw new ArgumentNullException ("buffer");
			
			if (count + offset > this.Length && 
			    count + offset < this.MaxLength+1)
				SetLength (count);
			
			Array.Copy (buffer, offsetInBuffer, this.buffer, offset, count);
		}