Fix ReceivedBytesThreshold (#87)

Author: josesimoes

System.IO.Ports/Properties/AssemblyInfo.cs

@@ -12,7 +12,7 @@
 
 ////////////////////////////////////////////////////////////////
 // update this whenever the native assembly signature changes //
-[assembly: AssemblyNativeVersion("100.1.5.0")]
+[assembly: AssemblyNativeVersion("100.1.6.0")]
 ////////////////////////////////////////////////////////////////
 
 // Setting ComVisible to false makes the types in this assembly not visible 

System.IO.Ports/SerialPort.cs

@@ -32,7 +32,8 @@ public sealed class SerialPort : IDisposable
 
         private int _writeTimeout = Timeout.Infinite;
         private int _readTimeout = Timeout.Infinite;
-        private int _receivedBytesThreshold;
+        // default threshold is 1
+        private int _receivedBytesThreshold = 1;
         private int _baudRate;
         private Handshake _handshake = Handshake.None;
         private StopBits _stopBits;
@@ -429,6 +430,7 @@ public int WriteTimeout
         /// Gets or sets the number of bytes in the internal input buffer before a <see cref="DataReceived"/>
         /// event occurs.
         /// </summary>
+        /// <value>The number of bytes in the internal input buffer before a <see cref="DataReceived"/> event is fired. The default is 1.</value>
         /// <exception cref="ArgumentOutOfRangeException">The <see cref="ReceivedBytesThreshold"/> value is less than or equal
         /// to zero.</exception>
         public int ReceivedBytesThreshold
@@ -437,12 +439,7 @@ public int ReceivedBytesThreshold
 
             set
             {
-                if (value <= 0)
-                {
-                    throw new ArgumentOutOfRangeException();
-                }
-
-                _receivedBytesThreshold = value;
+                NativeReceivedBytesThreshold(value);
             }
         }
 
@@ -849,6 +846,9 @@ public void Dispose()
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern string GetDeviceSelector();
 
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal extern void NativeReceivedBytesThreshold(int value);
+
         #endregion
     }
 }

version.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "assemblyVersion": {
     "precision": "revision"
   },