add ReadToEnd function

framework-dotnet/src/lib/MBS.Core/StreamExtensions.cs

@@ -96,4 +96,33 @@ public static class StreamExtensions
 		}
 		_streamPositions[st].Push(st.Position);
 	}
+
+	private const long BUFFER_SIZE=4096;
+	public static byte[] ReadToEnd(this Stream st)
+	{
+		byte[] buffer = new byte[BUFFER_SIZE];
+		byte[] output = new byte[0];
+		int i = 0;
+		bool done = false;
+		while (!done)
+		{
+			int length = st.Read(buffer, 0, buffer.Length);
+			if (length == 0)
+			{
+				done = true;
+				break;
+			}
+			
+			if (length < BUFFER_SIZE)
+			{
+				Array.Resize<byte>(ref buffer, length);
+				done = true;
+			}
+
+			Array.Resize<byte>(ref output, output.Length + buffer.Length);
+			Array.Copy(buffer, 0, output, i, buffer.Length);
+			i += buffer.Length;
+		}
+		return output;
+	}
 }