Address warnings in sample projects

samples/Configuration/HttpFunction.cs

@@ -25,15 +25,15 @@ public static MyType Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post
 
         public class MyType
         {
-            public string camelCasePropertyName { get; set; }
-            public string PascalCasePropertyName { get; set; }
-            public string NullValue { get; set; }
+            public string? camelCasePropertyName { get; set; }
+            public string? PascalCasePropertyName { get; set; }
+            public string? NullValue { get; set; }
 
             // This sample can use both System.Text.Json and Newtonsoft.Json, depending on which
             // is registered. Including both attributes here.
             [JsonPropertyName("Changed_Via_System_Text_Json")]
             [JsonProperty("Changed_Via_Newtonsoft_Json")]
-            public string DifferentSerializedName { get; set; }
+            public string? DifferentSerializedName { get; set; }
         }
     }
 }

samples/CustomMiddleware/ExceptionHandlingMiddleware.cs

@@ -60,7 +60,7 @@ public async Task Invoke(FunctionContext context, FunctionExecutionDelegate next
             }
         }
 
-        private OutputBindingData<HttpResponseData> GetHttpOutputBindingFromMultipleOutputBinding(FunctionContext context)
+        private static OutputBindingData<HttpResponseData>? GetHttpOutputBindingFromMultipleOutputBinding(FunctionContext context)
         {
             // The output binding entry name will be "$return" only when the function return type is HttpResponseData
             var httpOutputBinding = context.GetOutputBindings<HttpResponseData>()

samples/CustomMiddleware/HttpFunction.cs

@@ -23,7 +23,7 @@ public static HttpResponseData Run([HttpTrigger(AuthorizationLevel.Anonymous, "g
             var logger = context.GetLogger<HttpFunction>();
 
             // Get the item set by the middleware
-            if (context.Items.TryGetValue("middlewareitem", out object value) && value is string message)
+            if (context.Items.TryGetValue("middlewareitem", out object? value) && value is string message)
             {
                 logger.LogInformation("From middleware: {message}", message);
             }

samples/CustomMiddleware/HttpTriggerWithMultipleOutputBindings.cs

@@ -32,8 +32,8 @@ public static MyOutputType Run([HttpTrigger(AuthorizationLevel.Anonymous, "get")
     public class MyOutputType
     {
         [QueueOutput("functionstesting2", Connection = "AzureWebJobsStorage")]
-        public string Name { get; set; }
+        public string? Name { get; set; }
 
-        public HttpResponseData HttpResponse { get; set; }
+        public HttpResponseData? HttpResponse { get; set; }
     }
 }

samples/CustomMiddleware/MyCustomMiddleware.cs

@@ -20,7 +20,7 @@ public async Task Invoke(FunctionContext context, FunctionExecutionDelegate next
 
             // This happens after function execution. We can inspect the context after the function
             // was invoked
-            if (context.Items.TryGetValue("functionitem", out object value) && value is string message)
+            if (context.Items.TryGetValue("functionitem", out object? value) && value is string message)
             {
                 ILogger logger = context.GetLogger<MyCustomMiddleware>();
 

samples/Extensions/Blob/Book.cs

@@ -5,7 +5,8 @@ namespace SampleApp
 {
     public class Book
     {
-        public string Id { get; set; }
-        public string Name { get; set; }
+        public string? Id { get; set; }
+
+        public string? Name { get; set; }
     }
-}
+}

samples/Extensions/CosmosDB/CosmosDBFunction.cs

@@ -21,7 +21,7 @@ public CosmosDBFunction(ILogger<CosmosDBFunction> logger)
         [Function(nameof(CosmosDBFunction))]
         [ExponentialBackoffRetry(5, "00:00:04", "00:15:00")]
         [CosmosDBOutput("%CosmosDb%", "%CosmosContainerOut%", Connection = "CosmosDBConnection", CreateIfNotExists = true)]
-        public object Run(
+        public object? Run(
             [CosmosDBTrigger(
                 "%CosmosDb%",
                 "%CosmosContainerIn%",
@@ -48,9 +48,9 @@ public object Run(
 
     public class MyDocument
     {
-        public string Id { get; set; }
+        public string? Id { get; set; }
 
-        public string Text { get; set; }
+        public string? Text { get; set; }
 
         public int Number { get; set; }
 

samples/Extensions/CosmosDB/CosmosInputBindingFunctions.cs

@@ -265,15 +265,15 @@ public void DocByIdFromJSON(
 
         public class ToDoItem
         {
-            public string Id { get; set; }
-            public string Description { get; set; }
+            public string? Id { get; set; }
+            public string? Description { get; set; }
         }
 
         public class ToDoItemLookup
         {
-            public string ToDoItemId { get; set; }
+            public string? ToDoItemId { get; set; }
 
-            public string ToDoItemPartitionKeyValue { get; set; }
+            public string? ToDoItemPartitionKeyValue { get; set; }
         }
     }
 }

samples/Extensions/EventGrid/EventGridFunction.cs

@@ -1,8 +1,6 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
 using Microsoft.Azure.Functions.Worker;
 using Microsoft.Extensions.Logging;
 
@@ -15,8 +13,7 @@ public static class EventGridFunction
         public static MyEventType Run([EventGridTrigger] MyEventType input, FunctionContext context)
         {
             var logger = context.GetLogger(nameof(EventGridFunction));
-
-            logger.LogInformation(input.Data.ToString());
+            logger.LogInformation(input.Data?.ToString());
 
             var outputEvent = new MyEventType()
             {
@@ -34,16 +31,16 @@ public static MyEventType Run([EventGridTrigger] MyEventType input, FunctionCont
 
     public class MyEventType
     {
-        public string Id { get; set; }
+        public string? Id { get; set; }
 
-        public string Topic { get; set; }
+        public string? Topic { get; set; }
 
-        public string Subject { get; set; }
+        public string? Subject { get; set; }
 
-        public string EventType { get; set; }
+        public string? EventType { get; set; }
 
         public DateTime EventTime { get; set; }
 
-        public IDictionary<string, object> Data { get; set; }
+        public IDictionary<string, object>? Data { get; set; }
     }
 }

samples/Extensions/MultiOutput/MultiOutput.cs

@@ -38,7 +38,7 @@ public class MyOutputType
         [QueueOutput("myQueue")]
         public string? Name { get; set; }
 
-        public HttpResponseData HttpResponse { get; set; }
+        public HttpResponseData? HttpResponse { get; set; }
     }
     //</docsnippet_multiple_outputs>
 }

samples/Extensions/Queue/QueueFunction.cs

@@ -28,7 +28,7 @@ public string[] Run([QueueTrigger("input-queue")] Album myQueueItem, FunctionCon
             // Use a string array to return more than one message.
             string[] messages = {
                 $"Album name = {myQueueItem.Name}",
-                $"Album songs = {myQueueItem.Songs.ToString()}"};
+                $"Album songs = {myQueueItem.Songs}"};
 
             _logger.LogInformation("{msg1},{msg2}", messages[0], messages[1]);
 
@@ -58,10 +58,10 @@ public void QueueBinaryDataFunction([QueueTrigger("input-queue")] BinaryData mes
 
     public class Album
     {
-        public string Id { get; set; }
+        public string? Id { get; set; }
 
-        public string Name { get; set; }
+        public string? Name { get; set; }
 
-        public List<string> Songs { get; set; }
+        public List<string>? Songs { get; set; }
     }
 }

samples/Extensions/SignalR/SignalRFunction.cs

@@ -33,15 +33,15 @@ public static class SignalRFunction
 
     public class MyConnectionInfo
     {
-        public string Url { get; set; }
+        public string? Url { get; set; }
 
-        public string AccessToken { get; set; }
+        public string? AccessToken { get; set; }
     }
 
     public class MyMessage
     {
-        public string Target { get; set; }
+        public string? Target { get; set; }
 
-        public object[] Arguments { get; set; }
+        public object[]? Arguments { get; set; }
     }
 }

samples/Extensions/Table/TableFunction.cs

@@ -102,10 +102,10 @@ public void TablePocoFunction(
 
     public class MyTableData
     {
-        public string PartitionKey { get; set; }
+        public string? PartitionKey { get; set; }
 
-        public string RowKey { get; set; }
+        public string? RowKey { get; set; }
 
-        public string Text { get; set; }
+        public string? Text { get; set; }
     }
 }

samples/Extensions/Timer/TimerFunction.cs

@@ -15,7 +15,7 @@ public static void Run([TimerTrigger("0 */5 * * * *")] TimerInfo timerInfo,
             FunctionContext context)
         {
             var logger = context.GetLogger(nameof(TimerFunction));
-            logger.LogInformation($"Function Ran. Next timer schedule = {timerInfo.ScheduleStatus.Next}");
+            logger.LogInformation($"Function Ran. Next timer schedule = {timerInfo.ScheduleStatus?.Next}");
         }
         //</docsnippet_fixed_delay_retry_example>
     }