Added delayed message model image.

Author: Anton Vorontsov

RabbitMQ.Client.Core.DependencyInjection.sln

@@ -33,6 +33,11 @@ ProjectSection(SolutionItems) = preProject
 	docs\message-consumption.md = docs\message-consumption.md
 EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "images", "images", "{93D59B0E-856C-4260-B50E-57FE5C0F5073}"
+ProjectSection(SolutionItems) = preProject
+	docs\images\delayed-message-model.png = docs\images\delayed-message-model.png
+EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -64,6 +69,7 @@ Global
 		{10C10C9D-F2ED-43C8-B235-780DD75EF8E6} = {04EFD8F7-5120-4072-9728-64203F6F4873}
 		{6E75E157-373A-4056-898B-3713CDD5C06C} = {04EFD8F7-5120-4072-9728-64203F6F4873}
 		{1F81E848-7781-448F-BBBB-6A1E509B76CC} = {04EFD8F7-5120-4072-9728-64203F6F4873}
+		{93D59B0E-856C-4260-B50E-57FE5C0F5073} = {BC4CDBDE-4AEE-44B3-B00B-380EB1AC5E62}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0EBBD182-65B2-47F9-ABBE-64B5B8C9652F}

docs/images/delayed-message-model.png

@@ -106,7 +106,9 @@ queueService.Send(bytes, properties, exchangeName: "exchange.name", routingKey:
 await queueService.SendAsync(bytes, properties, exchangeName: "exchange.name", routingKey: "routing.key", secondsDelay: 10);
 ```
 
-### Delayed message mechanism
+### Mechanism of sending delayed messages
+
+![Model of sending delayed messages](./images/delayed-message-model.png)
 
 For the exchange configuration see the [Previous page](exchange-configuration.md) <br>
 For message consumption features see the [Next page](message-consumption.md)

docs/message-production.md

@@ -13,7 +13,7 @@ This section contains only example of basic usage of the library. You can find t
 
 To produce messages in the RabbitMQ queue you have to go through the routine of configuring RabbitMQ connection and exchanges. In your `Startup` file you can do it simply calling couple methods in a fluent-Api way.
 
-```csharp
+```c#
 public static IConfiguration Configuration { get; set; }
 
 public void ConfigureServices(IServiceCollection services)
@@ -31,7 +31,7 @@ Example of `appsettings.json` is two sections below. You can also configure ever
 
 Now you can inject an instance implementing `IQueueService` inside anything you want.
 
-```csharp
+```c#
 [Route("api/[controller]")]
 public class HomeController : Controller
 {
@@ -45,7 +45,7 @@ public class HomeController : Controller
 
 Now you can send messages using `Send` or `SendAsync` methods.
 
-```csharp
+```c#
 var messageObject = new
 {
     Id = 1,
@@ -60,7 +60,7 @@ _queueService.Send(
 
 You can also send delayed messages.
 
-```csharp
+```c#
 _queueService.Send(
     @object: messageObject,
     exchangeName: "exchange.name",
@@ -74,7 +74,7 @@ _queueService.Send(
 
 After making message production possible let's make the consumption possible too! Imagine that a consumer will be a simple console application.
 
-```csharp
+```c#
 class Program
 {
     const string ExchangeName = "exchange.name";
@@ -114,7 +114,7 @@ The very last step is to start "listening" (consuming) by simply calling `StartC
 
 Message handler example.
 
-```csharp
+```c#
 public class CustomMessageHandler : IMessageHandler
 {
     readonly ILogger<CustomMessageHandler> _logger;