C# - CS0103 : The name 'Brushes' does not exist in current context

Try to add a package:

• Right-click the project in Solution Explorer, select “Manage NuGet Packages”,
• Go to Browse tab, search for System.Drawing,
• Select and install the System.Drawing.Common package.

However, if you are using .NET Framework instead of .NET, then:

• Right-click the project in Solution Explorer, select Add, Refererence,
• Go to Assemblies, select System.Drawing.

Here are the most likely causes and solutions you can try out:

1.      Missing reference to System.Drawing.Common-

In newer .Net versions (especially .Net core, .Net 5,6,or later) the system.drawing namespaces does not come included by default.Manually Install of package is required.

Fix:

Open your terminal or package manager console and run:

Dotnet add package System.Drawing.Common

Or in Visual Studio:

·         Right click on your project-> Manage NuGet Packages

·         Search for System.Drawing.Common

·         Click Install

·         Then rebuild your project

2.      Ensure project Targets Windows-

As of .Net6 and above System.Drawing.Common is only supported on windows by default

Add this to your .csproj file if you are using .Net 6 or later:

<PropertyGroup>

<TargetFramework>net6.0-windows</TargetFramework>

<UseWindowsForms>true</UseWindowsForms>

</Propertygroup>