resolve PR comments

Author: xinyzhou

dotnet/InkRecognition/wpf-app/README.md

@@ -7,7 +7,7 @@ products:
   - azure
 ---
 
-# Ink Recogizer Cognitive Service C# WPF Sample
+# Ink Recognizer Cognitive Service C# WPF Sample
 
 ![Build passing](https://img.shields.io/badge/build-passing-brightgreen.svg) ![License](https://img.shields.io/badge/license-MIT-green.svg)
 
@@ -54,8 +54,8 @@ This sample provides the following features:
 ### Run the sample
 
 * To debug the sample and then run it, select **Debug > Start Debugging**. To run the sample without debugging, select **Debug > Start Without Debugging**.
-* Write down something one the upper rectangle of the app
-* After one second of inactivity, the ink will be recognized and the result will be visible in the lower rectangle of the app
+* Write down something on the upper region of the app
+* After one second of inactivity, the ink will be recognized and the result will be visible in the lower region of the app
 
 ## Resources
 

dotnet/InkRecognition/wpf-app/src/MainWindow.xaml.cs

@@ -25,7 +25,7 @@ public partial class MainWindow : Window
         public MainWindow()
         {
             InitializeComponent();
-
+            // Replace the subscriptionKey string value with your valid subscription key
             const string subscriptionKey = "[YOUR SUBSCRIPTION KEY]";
             const string endpoint = "https://api.cognitive.microsoft.com";
             const string inkRecognitionUrl = "/inkrecognizer/v1.0-preview/recognize";

dotnet/InkRecognition/wpf-app/src/Services/Ink/InkRecognizer.cs

@@ -17,7 +17,7 @@ public class InkRecognizer
 
         HttpManager httpManager;
 
-        // Default DPI setting. 96.0 is Windows default DPI
+        // Default DPI setting to use when device displayInfo is not set
         float dpiX = 96.0f;
         float dpiY = 96.0f;