Update samples (Azure#18293)

sdk/eventgrid/Azure.Messaging.EventGrid/README.md

@@ -121,7 +121,7 @@ List<CloudEvent> eventsList = new List<CloudEvent>
     new CloudEvent(
         "/cloudevents/example/binarydata",
         "Example.EventType",
-        new BinaryData("This is binary data"),
+        Encoding.UTF8.GetBytes("This is binary data"),
         "example/binary")};
 
 // Send the events

sdk/eventgrid/Azure.Messaging.EventGrid/samples/Sample1_PublishEventsToTopic.md

@@ -24,6 +24,15 @@ EventGridPublisherClient client = new EventGridPublisherClient(
     new AzureKeyCredential(topicAccessKey),
     clientOptions);
 ```
+Event Grid also supports authenticating with a shared access signature which allows for providing access to a resource that expires by a certain time without sharing your access key:
+```C# Snippet:CreateWithSas
+var builder = new EventGridSasBuilder(new Uri(topicEndpoint), DateTimeOffset.Now.AddHours(1));
+var keyCredential = new AzureKeyCredential(topicAccessKey);
+var sasCredential = new AzureSasCredential(builder.GenerateSas(keyCredential));
+EventGridPublisherClient client = new EventGridPublisherClient(
+    new Uri(topicEndpoint),
+    sasCredential);
+```
 
 ## Publishing Events to Azure Event Grid
 ### Using `EventGridEvent`
@@ -69,7 +78,7 @@ List<CloudEvent> eventsList = new List<CloudEvent>
     new CloudEvent(
         "/cloudevents/example/binarydata",
         "Example.EventType",
-        new BinaryData("This is binary data"),
+        Encoding.UTF8.GetBytes("This is binary data"),
         "example/binary")};
 
 // Send the events

sdk/eventgrid/Azure.Messaging.EventGrid/tests/Samples/Sample1_SendEventsToTopicAndDomain.cs

@@ -47,6 +47,37 @@ public async Task SendEventGridEventsToTopic()
             #endregion
         }
 
+        [Test]
+        public async Task AuthenticateWithSasToken()
+        {
+            string topicEndpoint = TestEnvironment.TopicHost;
+            string topicAccessKey = TestEnvironment.TopicKey;
+
+            // Create the publisher client using an AzureKeyCredential
+            // Custom topic should be configured to accept events of the Event Grid schema
+            #region Snippet:CreateWithSas
+            var builder = new EventGridSasBuilder(new Uri(topicEndpoint), DateTimeOffset.Now.AddHours(1));
+            var keyCredential = new AzureKeyCredential(topicAccessKey);
+            var sasCredential = new AzureSasCredential(builder.GenerateSas(keyCredential));
+            EventGridPublisherClient client = new EventGridPublisherClient(
+                new Uri(topicEndpoint),
+                sasCredential);
+            #endregion
+
+            // Add EventGridEvents to a list to publish to the topic
+            List<EventGridEvent> eventsList = new List<EventGridEvent>
+            {
+                new EventGridEvent(
+                    "ExampleEventSubject",
+                    "Example.EventType",
+                    "1.0",
+                    "This is the event data")
+            };
+
+            // Send the events
+            await client.SendEventsAsync(eventsList);
+        }
+
         // This sample demonstrates how to publish CloudEvents 1.0 schema events to an Event Grid topic.
         [Test]
         public async Task SendCloudEventsToTopic()
@@ -89,7 +120,7 @@ public async Task SendCloudEventsToTopic()
                 new CloudEvent(
                     "/cloudevents/example/binarydata",
                     "Example.EventType",
-                    new BinaryData("This is binary data"),
+                    Encoding.UTF8.GetBytes("This is binary data"),
                     "example/binary")};
 
             // Send the events