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Add root level cascading values sample
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‎README.md

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# Samples for ASP.NET Core 6.0 (485)
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# Samples for ASP.NET Core 6.0 (486)
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- Samples for ASP.NET Core **8.0 Preview 7** is available [here](/projects/.net8) (23).
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- Samples for ASP.NET Core **8.0 Preview 7** is available [here](/projects/.net8) (24).
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- Samples for ASP.NET Core **7.0** is available [here](/projects/.net7) (45).
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- Samples for ASP.NET Core **8.0 Preview 6** using EdgeDB.NET is [here](https://github.com/edgedb/edgedb-net).
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‎projects/.net8/ComponentTwentyThree/.vscode/settings.json

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{
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"dotnet.defaultSolution": "ComponentTwentyThree.sln"
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}

‎projects/.net8/ComponentTwentyThree/App.razor

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<Router AppAssembly="typeof(Program).Assembly">
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<Found Context="routeData">
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<RouteView RouteData="routeData" DefaultLayout="typeof(MainLayout)" />
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</Found>
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<NotFound>
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<h1>Page not found</h1>
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<p>Sorry, but there's nothing here!</p>
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</NotFound>
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</Router>

‎projects/.net8/ComponentTwentyThree/ComponentTwentyThree.csproj

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<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
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<PropertyGroup>
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<TargetFramework>net8.0</TargetFramework>
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<ImplicitUsings>true</ImplicitUsings>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.0-preview.7.*" />
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<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.0-preview.7.*" />
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<Watch Include="**\*.cshtml" />
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<Watch Include="**\*.razor" />
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</ItemGroup>
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</Project>

‎projects/.net8/ComponentTwentyThree/ComponentTwentyThree.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.5.002.0
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComponentTwentyThree", "ComponentTwentyThree.csproj", "{26B459F9-76ED-44D4-AA0F-65D28D8E7861}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{26B459F9-76ED-44D4-AA0F-65D28D8E7861}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{26B459F9-76ED-44D4-AA0F-65D28D8E7861}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{26B459F9-76ED-44D4-AA0F-65D28D8E7861}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{26B459F9-76ED-44D4-AA0F-65D28D8E7861}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {6FC14629-365F-45CC-A524-50A03305E39D}
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EndGlobalSection
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EndGlobal

‎projects/.net8/ComponentTwentyThree/Pages/Index.razor

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@page "/"
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<h1>Cascading Values</h1>
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<InnerComponentOne />
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‎projects/.net8/ComponentTwentyThree/Pages/InnerComponentOne.razor

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<h2>Inner Component One</h2>
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@Message.Message
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<InnerComponentTwo />
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@code {
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[CascadingParameter]
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protected MessageCascade Message { get; set; } = default!;
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}

‎projects/.net8/ComponentTwentyThree/Pages/InnerComponentTwo.razor

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<h3>Inner Component Two</h3>
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@Message.Message
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@code {
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[CascadingParameter]
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protected MessageCascade Message { get; set; } = default!;
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}

‎projects/.net8/ComponentTwentyThree/Program.cs

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using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
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using ComponentTwentyThree;
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var builder = WebAssemblyHostBuilder.CreateDefault(args);
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builder.RootComponents.Add<App>("app");
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builder.Services.AddCascadingValue(sp => new MessageCascade("Hello World!"));
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var app = builder.Build();
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await app.RunAsync();
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public record MessageCascade(string Message);

‎projects/.net8/ComponentTwentyThree/README.md

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# Setting fixed root level cascading values
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This sample shows how to set root level cascading values without using `<CascadingValue/>` component.

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