Updated the README.md file

Author: RavikumarAkuthotaSf4250

README.md

@@ -1,2 +1,73 @@
 # assign-unique-color-to-each-user-name-and-message-in-a-group-chat-in-Xamarin.Forms.Chat
 Describes how to assign a separate color to each user in a group chat to display that user's name and that user's message in one unique color.
+
+## Sample
+
+```xaml
+
+        <ContentPage.Resources>
+        <ResourceDictionary>
+            <local:AuthorColorConverter x:Name="authorColorConverter" x:Key="authorColorConverter" />
+
+            <!--Defining outgoing message author color-->
+            <Style TargetType="sfChat:OutgoingMessageAuthorView">
+                <Setter Property="ControlTemplate">
+                    <Setter.Value>
+                        <ControlTemplate>
+                            <Label Text="{Binding Author.Name}" BackgroundColor="Transparent" TextColor="{TemplateBinding BindingContext, Converter= {StaticResource authorColorConverter},ConverterParameter={x:Reference viewModel}}" BindingContext="{TemplateBinding BindingContext}"/>
+                        </ControlTemplate>
+                    </Setter.Value>
+                </Setter>
+            </Style>
+
+            <!--Defining incoming message author color-->
+            <Style TargetType="sfChat:IncomingMessageAuthorView">
+                <Setter Property="ControlTemplate">
+                    <Setter.Value>
+                        <ControlTemplate>
+                            <Label Text="{Binding Author.Name}" BackgroundColor="Transparent" TextColor="{TemplateBinding BindingContext, Converter= {StaticResource authorColorConverter},ConverterParameter={x:Reference viewModel}}" BindingContext="{TemplateBinding BindingContext}"/>
+                        </ControlTemplate>
+                    </Setter.Value>
+                </Setter>
+            </Style>
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
+Converter:
+
+    public class AuthorColorConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var viewModel = parameter as ViewModel;
+            var message = value as IMessage;
+
+            if (viewModel.AuthorColors.ContainsKey(message.Author))
+            {
+                Color color;
+                viewModel.AuthorColors.TryGetValue(message.Author, out color);
+                return color;
+            }
+            else
+            {
+                return viewModel.AddColorForAuthor(message.Author);
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return Color.White;
+        }
+    }
+
+```
+
+## Requirements to run the demo
+
+To run the demo, refer to [System Requirements for Xamarin](https://help.syncfusion.com/xamarin/system-requirements)
+
+## Troubleshooting
+
+### Path too long exception
+
+If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.