[Bluetooth][Non-ACR] Add API document (#1885)

Signed-off-by: Wootak Jung <wootak.jung@samsung.com>

diff --git a/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothGatt.cs b/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothGatt.cs
index 3b532af..0815fcc 100644 (file)
--- a/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothGatt.cs
+++ b/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothGatt.cs
@@ -824,6 +824,7 @@ namespace Tizen.Network.Bluetooth
         /// The NotificationStateChanged event is called when the client enables or disables the Notification/Indication for particular characteristics.
         /// </summary>
         /// <remarks>
+        /// BluetoothGattServer.RegisterGattService() should be called before adding/removing this EventHandler.
         /// Adding event handle on the characteristic on the client side will not have any effect.
         /// </remarks>
         /// <since_tizen> 3 </since_tizen>
@@ -1080,6 +1081,9 @@ namespace Tizen.Network.Bluetooth
         /// <summary>
         /// This event is called when the client request to read the value of a characteristic or a descriptor.
         /// </summary>
+        /// <remarks>
+        /// BluetoothGattServer.RegisterGattService() should be called before adding/removing this EventHandler.
+        /// </remarks>
         /// <exception cref="InvalidOperationException">Thrown when the set read value requested callback procedure fails.</exception>
         /// <since_tizen> 3 </since_tizen>
         public event EventHandler<ReadRequestedEventArgs> ReadRequested
@@ -1108,6 +1112,9 @@ namespace Tizen.Network.Bluetooth
         /// <summary>
         /// This event is called when a value of a characteristic or a descriptor has been changed by a client.
         /// </summary>
+        /// <remarks>
+        /// BluetoothGattServer.RegisterGattService() should be called before adding/removing this EventHandler.
+        /// </remarks>
         /// <exception cref="InvalidOperationException">Thrown when the set write value requested callback procedure fails.</exception>
         /// <since_tizen> 3 </since_tizen>
         public event EventHandler<WriteRequestedEventArgs> WriteRequested