Updated the target framework version

README.md

@@ -40,8 +40,13 @@ This can be achieved by setting the desired brush color to the wall and to chang
 
     </Syncfusion:SfChart3D >
 ```
+## Troubleshooting
 
-KB article - [How-to-customize-the-background-color-and-size-of-WPF-3D-chart](https://www.syncfusion.com/kb/11885/how-to-customize-the-wall-of-wpf-3d-charts)
+#### Path too long exception
+
+If you are facing a path too long exception when building this example project, close Visual Studio and rename the repository to a shorter name before building the project.
+
+For more details, refer to the KB on [How to customize the wall of WPF 3D Charts?](https://www.syncfusion.com/kb/11885/how-to-customize-the-wall-of-wpf-3d-charts).
 
 **See also**
 

Wall_Customization/Chart_GettingStarted/App.config

@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8"/>
     </startup>
-</configuration>
+</configuration>

Wall_Customization/Chart_GettingStarted/Chart_GettingStarted.csproj

@@ -8,12 +8,13 @@
     <OutputType>WinExe</OutputType>
     <RootNamespace>Chart_GettingStarted</RootNamespace>
     <AssemblyName>Chart_GettingStarted</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <WarningLevel>4</WarningLevel>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <Deterministic>true</Deterministic>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>