Improved memory performance of TextColorToGenerator (#1254)

* Avoiding boxing enumerators of built-in types and also unrolled this LINQ expression, both of which reduce memory allocations thus improving GC behavior.

* Replaced null check with ‘is’ instead of ‘==‘.

* Update azure-pipelines.yml

* Fix Vulnerable Tizen Dependency

* Change `SkiaSharp` -> `SkiaSharp.Views` and move it to `CommunityToolkit.Maui.Core`

---------

Co-authored-by: Brandon Minnick <13558917+brminnick@users.noreply.github.com>

azure-pipelines.yml

@@ -257,7 +257,8 @@ jobs:
 
       # check vulnerabilities
       - powershell: |
-          dotnet list $(PathToLibrarySolution) package --vulnerable --include-transitive | findstr /S /c:"has the following vulnerable packages";
+          dotnet list $(PathToLibrarySolution) package --include-transitive # Print all transitive packages
+          dotnet list $(PathToLibrarySolution) package --vulnerable --include-transitive | findstr /S /c:"has the following vulnerable packages"; # Print all transitive packages with vulnerabilities
           if ($LastExitCode -ne 1)
           {
             dotnet list $(PathToLibrarySolution) package --vulnerable --include-transitive;

src/CommunityToolkit.Maui.Core/CommunityToolkit.Maui.Core.csproj

@@ -50,6 +50,10 @@
     <None Include="ReadMe.txt" pack="true" PackagePath="." />
   </ItemGroup>
 
+  <ItemGroup Condition="$(TargetFramework.Contains('-tizen'))">
+    <PackageReference Include="SkiaSharp.Views" Version="[2.88.6,)" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="DotNet.ReproducibleBuilds" Version="1.1.1">
       <PrivateAssets>all</PrivateAssets>

src/CommunityToolkit.Maui.SourceGenerators/Generators/TextColorToGenerator.cs

@@ -68,7 +68,24 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
 					throw new Exception("There's no .NET MAUI referenced in the project.");
 				}
 
-				var mauiAssembly = compilation.SourceModule.ReferencedAssemblySymbols.Single(q => q.Name == mauiControlsAssembly);
+				var mauiAssembly = default(IAssemblySymbol);
+				foreach (var assemblySymbol in compilation.SourceModule.ReferencedAssemblySymbols)
+				{
+					if (assemblySymbol.Name == mauiControlsAssembly)
+					{
+						if (mauiAssembly is not null)
+						{
+							throw new InvalidOperationException("There can only be one reference to the Maui Controls assembly.");
+						}
+
+						mauiAssembly = assemblySymbol;
+					}
+				}
+				if (mauiAssembly is null)
+				{
+					throw new InvalidOperationException("There is no reference to the Maui Controls assembly.");
+				}
+
 				var symbols = GetMauiInterfaceImplementors(mauiAssembly, iAnimatableInterfaceSymbol, iTextStyleInterfaceSymbol).Where(static x => x is not null);
 
 				return symbols;