blocks|key|763059|text|我终于成功了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|763060|我做了指南说的所有事情，除了我更改为以下内容的项目文件：|offset|length|763061|<Project+Sdk="Microsoft.NET.Sdk.Web">

++<PropertyGroup>
++++<TargetFramework>net5.0</TargetFramework>
++++<UserSecretsId>*****</UserSecretsId>
++++<UseBlazorWebAssembly>true</UseBlazorWebAssembly>
++</PropertyGroup>
...|code-block|syntax|javascript|763062|但我不知道当官方升级指南说要使用：|763063|<Project+Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">|763064|而不是：|763065|<Project+Sdk="Microsoft.NET.Sdk.Web">|763066|entityMap|0|LINK|mutability|MUTABLE|url|https://learn.microsoft.com/en-us/aspnet/core/migration/31-to-50?view=aspnetcore-3.1&tabs=visual-studio|1^0|0|3|2|0|0|0|6|6|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|F|3|G|5|H|7|16|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|M|3|N|5|H|7|1B|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|H|7|1D|8|@]|9|@]|A|$I|J]]|$1|S|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]|10|$5|V|W|X|A|$Y|Z]]]]

I finally made it work.
I did everything that <a href="https://learn.microsoft.com/en-us/aspnet/core/migration/31-to-50?view=aspnetcore-3.1&amp;tabs=visual-studio" rel="noreferrer">guide</a> said, except for the project file which I changed to this:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.Web&quot;&gt;

 &lt;PropertyGroup&gt;
 &lt;TargetFramework&gt;net5.0&lt;/TargetFramework&gt;
 &lt;UserSecretsId&gt;*****&lt;/UserSecretsId&gt;
 &lt;UseBlazorWebAssembly&gt;true&lt;/UseBlazorWebAssembly&gt;
 &lt;/PropertyGroup&gt;
...
</code></pre>
But I have no idea if it is correct when <a href="https://learn.microsoft.com/en-us/aspnet/core/migration/31-to-50?view=aspnetcore-3.1&amp;tabs=visual-studio" rel="noreferrer">official upgrade guide</a> says to use:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.BlazorWebAssembly&quot;&gt;
</code></pre>
instead of:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.Web&quot;&gt;
</code></pre>

blocks|key|763080|text|也遇到了同样的问题，终于成功了。下面是如何实现的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|763081|在我的例子中，错误并不是Blazor项目本身的结果，而是引用了同一解决方案中的项目。所引用的项目以.net标准2.1为目标，这本身应该很好；但是，它也安装了一些可能与NuGet依赖关系冲突的NuGet包：(Microsoft.Extentions.*)。|offset|length|style|BOLD|763082|Solution
-+Project+A+(.net+standard+2.1+-+Class+library)
++-+Dependencies
++++-+Packages
++++++-+Microsoft.Extensions.Configuration.Json+(<--+example+dependency)
-+Project+B+(.net+5+-+Blazor+webassembly)
++-+Dependencies
++++-+Projects
++++++-+Project+A+(<--+caused+the+error,+presumably+because+of+the+above+dependency)|code-block|syntax|javascript|763083|关于.net+5+rc的博客文章提到Blazor项目中的所有Microsoft.Extentions.*包应该更新为5.0.0-rc.1.*。|763084|能够通过删除项目依赖项来解决这个问题(我最初并不需要这个依赖项，但意外地被放置在那里)。|763085|我不明白的是，为什么'dotnet构建‘不会给出一个关于冲突的可以理解的错误消息，而只会给出这个关于运行时标识符的模糊消息，其中提到了Blazor项目。|763086|希望这对其他人也有帮助。|763087|entityMap|0|LINK|mutability|MUTABLE|url|https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-5-release-candidate-1/^0|0|C|8|S|D|0|0|I|8|0|G|0|0|0|1V|8|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@$D|14|E|15|F|G]|$D|16|E|17|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|18|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|19|8|@$D|1A|E|1B|F|G]]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|O|3|P|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1G|8|@$D|1H|E|1I|F|G]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1J|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

Had the same issue and finally got it working. Here's how.
In my case, the error wasn't the result of the Blazor project itself, but a referenced project in the same solution. The referenced project targets .net standard 2.1, which should be fine in itself; however, it also had some NuGet packages installed which might conflict with Blazor dependencies: (Microsoft.Extensions.*).
<pre><code>Solution
- Project A (.net standard 2.1 - Class library)
 - Dependencies
 - Packages
 - Microsoft.Extensions.Configuration.Json (&lt;-- example dependency)
- Project B (.net 5 - Blazor webassembly)
 - Dependencies
 - Projects
 - Project A (&lt;-- caused the error, presumably because of the above dependency)
</code></pre>
The <a href="https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-5-release-candidate-1/" rel="noreferrer">blog post about .net 5 rc</a> mentions all Microsoft.Extensions.* packages in a Blazor project should be updated to 5.0.0-rc.1.*.
Was able to resolve the issue by removing the project dependency (which I didn't need in the first place, but accidentally got placed there).
What I don't understand is why a 'dotnet build' doesn't give an understandable error message about a conflict instead of this vague message about the runtime identifier mentioning the Blazor project.
Hope this will help others as well.

blocks|key|137160|text|我遇到了一个不同的错误消息：“名称空间'ApplicationPartAttribute‘中不存在类型或名称空间名称'Microsoft.AspNetCore.Mvc.ApplicationParts’(您缺少程序集引用吗？)”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|137161|在我的例子中，我有一个共享的助手类库，我已经开始将通用数据api存储库构建为使用Microsoft.AspNetCore.Mvc+2.0，这在我使用新发布的.Net+5的.Net项目中被引用。|137162|为了解决这个问题，我不得不分离共享类项目，将泛型数据api元素移到一个新的项目中，该项目删除了.Net+5+Blazor和Microsoft.AspNetCore.Mvc+2.0之间的链接。|137163|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had this issue with a different error message &quot;The type or namespace name 'ApplicationPartAttribute' does not exist in the namespace 'Microsoft.AspNetCore.Mvc.ApplicationParts' (are you missing an assembly reference?)&quot;.
In my case I had a shared helper class library that I had started to build generic data api repositories into using Microsoft.AspNetCore.Mvc 2.0 which was referenced in my Blazor project using the newly released .Net 5.
To resolve this, I had to separate the shared class project moving the generic data api elements to a new project which removed the link between .Net 5 Blazor and Microsoft.AspNetCore.Mvc 2.0.

blocks|key|135478|text|我用理查德描述的方式解决了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135479|清除了对Microsoft.Extensions.Logging，Microsoft.Extensions.Configuration，.服务器和客户端引用的所有解决方案项目中的包版本3.2|ordered-list-item|135480|更新的.Server项目|135481|更新的.Client项目。将元素保存在目标框架部分，并且工作正常。|135482|<PropertyGroup>
++++<TargetFramework>net5.0</TargetFramework>
++++<RazorLangVersion>3.0</RazorLangVersion>
</PropertyGroup>|code-block|syntax|javascript|135483|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Q|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|T|8|@]|9|@]|A|$L|M]]|$1|N|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|O|$]]

I resolved this issue in a way Richard described:
<ol>
<li>Cleaned up references to Microsoft.Extensions.Logging, Microsoft.Extensions.Configuration,... packages version 3.2 in all solution projects referenced by server and client</li>
<li>Updated .Server project</li>
<li>Updated .Client project.
Kept element at target framework section and it worked</li>
</ol>
<pre><code>&lt;PropertyGroup&gt;
 &lt;TargetFramework&gt;net5.0&lt;/TargetFramework&gt;
 &lt;RazorLangVersion&gt;3.0&lt;/RazorLangVersion&gt;
&lt;/PropertyGroup&gt;
</code></pre>

blocks|key|137182|text|我也面临着同样的问题，并在这篇文章中询问微软：https://github.com/dotnet/aspnetcore/issues/27738。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|137183|您需要更新您的项目，以使用下面的SDK；|137184|Client+-+Microsoft.NET.Sdk.BlazorWebAssembly
Server+-+Microsoft.NET.Sdk.Web
Shared+-+Microsoft.NET.Sdk|code-block|syntax|javascript|137185|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/dotnet/aspnetcore/issues/27738^0|N|1D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

I faced the same issue and asked Microsoft about that under this post:
<a href="https://github.com/dotnet/aspnetcore/issues/27738" rel="noreferrer">https://github.com/dotnet/aspnetcore/issues/27738</a>
You need to update your projects to use below SDK's;
<pre><code>Client - Microsoft.NET.Sdk.BlazorWebAssembly
Server - Microsoft.NET.Sdk.Web
Shared - Microsoft.NET.Sdk
</code></pre>

blocks|key|763250|text|谢谢你的帮助，在我的例子中，我必须跟进@Kasta和官方指南提到的步骤。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|763251|我确保下面的SDK更改已经到位，谢谢您@OzanYasinDogan提到这一点。|763252|Client+-+Microsoft.NET.Sdk.BlazorWebAssembly|unordered-list-item|offset|length|style|CODE|763253|服务器-+Microsoft.NET.Sdk.Web|763254|共享-+Microsoft.NET.Sdk|763255|就我而言，我不得不|763256|删除<RuntimeIdentifier>browser-wasm</RuntimeIdentifier>和<UseBlazorWebAssembly>true</UseBlazorWebAssembly>。这里提到的|763257|从Microsoft.AspNetCore.Components.WebAssembly.BuildServer项目文件中删除3.xx.xx版本导致冲突的Blazor.Client。|763258|entityMap|0|LINK|mutability|MUTABLE|url|https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-5-preview-7/#upgrade-existing-blazor-webassembly-projects^0|0|0|9|Z|0|5|L|0|4|H|0|0|2|1F|1I|1D|2W|5|0|0|1|1J|25|D|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|14|8|@$G|15|H|16|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|17|8|@$G|18|H|19|I|J]]|9|@]|A|$]]|$1|M|3|N|5|F|7|1A|8|@$G|1B|H|1C|I|J]]|9|@]|A|$]]|$1|O|3|P|5|6|7|1D|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|1E|8|@$G|1F|H|1G|I|J]|$G|1H|H|1I|I|J]]|9|@$G|1J|H|1K|1|1L]]|A|$]]|$1|S|3|T|5|F|7|1M|8|@$G|1N|H|1O|I|J]|$G|1P|H|1Q|I|J]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

Thanks for your help, In my case, I have to followup steps mentioned by @Kasta and official guide.
I make sure that below SDK changes are in place,Thank you @OzanYasinDogan for mentioning this helps.
<ul>
<li>Client - <code>Microsoft.NET.Sdk.BlazorWebAssembly</code></li>
<li>Server - <code>Microsoft.NET.Sdk.Web</code></li>
<li>Shared - <code>Microsoft.NET.Sdk</code></li>
</ul>
In my case, I had to
<ul>
<li>Remove the <code>&lt;RuntimeIdentifier&gt;browser-wasm&lt;/RuntimeIdentifier&gt;</code> and
<code>&lt;UseBlazorWebAssembly&gt;true&lt;/UseBlazorWebAssembly&gt;</code>.
<a href="https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-5-preview-7/#upgrade-existing-blazor-webassembly-projects" rel="nofollow noreferrer">Mentioned here</a></li>
<li>Remove <code>Microsoft.AspNetCore.Components.WebAssembly.BuildServer</code> which was version 3.xx.xx causing conflicts from <code>Blazor.Client</code> Project file.</li>
</ul>

blocks|key|2634615|text|在我的例子中，我引用了一个引用数据层类的项目，而那里对于Blazor客户端或“browser-wasm”来说是不安全的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2634616|在我从客户端解决方案>依赖项>项目中删除引用之后，我的解决方案编译了。|2634617|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

In my case I had referenced a project that was referencing Data layer classes and there for was not safe for Blazor Client side or 'browser-wasm'.
After I removed the reference from Client solution &gt; Dependencies &gt; Projects
My solution compiled.

blocks|key|135564|text|我也经历过同样的问题，并发现原因是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|135565|++++<UseAppHost>true</UseAppHost>|code-block|syntax|javascript|135566|它用于常见的Directory.Build.props中。|offset|length|style|CODE|135567|通过将其设置为false，我不再获得丢失的browser-wasm错误。|135568|entityMap^0|0|0|6|L|0|L|C|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@$I|W|J|X|K|L]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

I experienced the same issue and discovered the cause to be
<pre class="lang-xml prettyprint-override"><code> &lt;UseAppHost&gt;true&lt;/UseAppHost&gt;
</code></pre>
which was used in a common <code>Directory.Build.props</code>
By setting this back to false I no longer get the missing <code>browser-wasm</code> error.

blocks|key|2634721|text|在对BlazorWASM应用程序引用的项目中的下列软件包进行注释后出现的错误，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2634722|
++++++++
++++++++|code-block|syntax|javascript|2634723|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The error gone after comment out reference to the following packages in a project refered by BlazorWASM app,
<pre class="lang-xml prettyprint-override"><code>&lt;!--&lt;PackageReference Include=&quot;FluentValidation.AspNetCore&quot; Version=&quot;10.3.6&quot; /&gt;--&gt;
 &lt;!--&lt;PackageReference Include=&quot;Microsoft.AspNetCore.Authentication.JwtBearer&quot; Version=&quot;6.0.1&quot; /&gt;--&gt;
 &lt;!--&lt;PackageReference Include=&quot;NLog.Web.AspNetCore&quot; Version=&quot;4.14.0&quot; /&gt;--&gt;
</code></pre>

blocks|key|137296|text|在一个NET6.0BLazor应用程序中，我不小心将这些错误添加到我的共享项目中，而不是API项目--纠正了问题，从而获得了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|137297|++++<PackageReference+Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore"+Version="6.0.3"+/>
++++<PackageReference+Include="Microsoft.EntityFrameworkCore.Tools"+PrivateAssets="all"+Version="6.0.3"+/>
++++<PackageReference+Include="Microsoft.EntityFrameworkCore.Sqlite"+Version="6.0.3"+/>|code-block|syntax|javascript|137298|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In a NET 6.0 Blazor app, I managed to get this error by accidently adding these to my Shared project instead of the API project - corrected and problem went away.
<pre><code> &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore&quot; Version=&quot;6.0.3&quot; /&gt;
 &lt;PackageReference Include=&quot;Microsoft.EntityFrameworkCore.Tools&quot; PrivateAssets=&quot;all&quot; Version=&quot;6.0.3&quot; /&gt;
 &lt;PackageReference Include=&quot;Microsoft.EntityFrameworkCore.Sqlite&quot; Version=&quot;6.0.3&quot; /&gt;
</code></pre>

blocks|key|2634763|text|我有相同的issu，我使用以下方法来解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2634764|<Project+Sdk="Microsoft.NET.Sdk.Web">
++<PropertyGroup>
++++<TargetFramework>net6.0</TargetFramework>
++++<UseBlazorWebAssembly>true</UseBlazorWebAssembly>
++++<Nullable>enable</Nullable>
++++<ImplicitUsings>enable</ImplicitUsings>
++++<AssemblyName>$(AssemblyName.Replace('+',+'_'))</AssemblyName>
++</PropertyGroup>

++<ItemGroup>
++++<PackageReference+Include="Microsoft.AspNetCore.Components.WebAssembly"+Version="6.0.4"+/>
++++<PackageReference+Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer"+Version="6.0.4"+PrivateAssets="all"+/>
++</ItemGroup>|code-block|syntax|javascript|2634765|而不是：|2634766|<Project+Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

++<PropertyGroup>
++++<TargetFramework>net6.0</TargetFramework>
++++<Nullable>enable</Nullable>
++++<ImplicitUsings>enable</ImplicitUsings>
++++<AssemblyName>$(AssemblyName.Replace('+',+'_'))</AssemblyName>
++</PropertyGroup>+-->

++<ItemGroup>
++++<PackageReference+Include="Microsoft.AspNetCore.Components.WebAssembly"+Version="6.0.4"+/>
++++<PackageReference+Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer"+Version="6.0.4"+PrivateAssets="all"+/>
++</ItemGroup>+|2634767|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I had the same issu and I resolve it by using:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.Web&quot;&gt;
 &lt;PropertyGroup&gt;
 &lt;TargetFramework&gt;net6.0&lt;/TargetFramework&gt;
 &lt;UseBlazorWebAssembly&gt;true&lt;/UseBlazorWebAssembly&gt;
 &lt;Nullable&gt;enable&lt;/Nullable&gt;
 &lt;ImplicitUsings&gt;enable&lt;/ImplicitUsings&gt;
 &lt;AssemblyName&gt;$(AssemblyName.Replace(' ', '_'))&lt;/AssemblyName&gt;
 &lt;/PropertyGroup&gt;

 &lt;ItemGroup&gt;
 &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Components.WebAssembly&quot; Version=&quot;6.0.4&quot; /&gt;
 &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Components.WebAssembly.DevServer&quot; Version=&quot;6.0.4&quot; PrivateAssets=&quot;all&quot; /&gt;
 &lt;/ItemGroup&gt;
</code></pre>
Instead of:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.BlazorWebAssembly&quot;&gt;

 &lt;PropertyGroup&gt;
 &lt;TargetFramework&gt;net6.0&lt;/TargetFramework&gt;
 &lt;Nullable&gt;enable&lt;/Nullable&gt;
 &lt;ImplicitUsings&gt;enable&lt;/ImplicitUsings&gt;
 &lt;AssemblyName&gt;$(AssemblyName.Replace(' ', '_'))&lt;/AssemblyName&gt;
 &lt;/PropertyGroup&gt; --&gt;

 &lt;ItemGroup&gt;
 &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Components.WebAssembly&quot; Version=&quot;6.0.4&quot; /&gt;
 &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Components.WebAssembly.DevServer&quot; Version=&quot;6.0.4&quot; PrivateAssets=&quot;all&quot; /&gt;
 &lt;/ItemGroup&gt; 
</code></pre>

blocks|key|137374|text|在更新nuget包并将不正确的包添加到不正确的项目后，我也遇到了同样的问题。我有一个轻巧的Project.Application.csproj：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|137375|<Project+Sdk="Microsoft.NET.Sdk">|code-block|syntax|javascript|137376|在这个项目中，我有一个包：|137377|<PackageReference+Include="FluentValidation"+Version="10.4.0"+/>|137378|我意外地添加了额外的软件包：|137379|<PackageReference+Include="FluentValidation.AspNetCore"+Version="10.4.0"+/>|137380|然后我的密码就坏了。|137381|FluentValidation.AspNetCore似乎与Microsoft.NET.Sdk.BlazorWebAssembly不兼容，后者引用了librabry+Project.Application.csproj，因此要注意Blazor项目中引用的所有项目，这样它们就不会包含不兼容的包。|137382|entityMap^0|19|Q|0|0|0|0|0|0|0|0|R|U|Z|2B|Q|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|16|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|W|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|X|$]]

I had the same problem after I updated nuget packages and added incorrect package to incorrect project.
I had a librabry Project.Application.csproj with:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk&quot;&gt;
</code></pre>
in this project I had package:
<pre><code>&lt;PackageReference Include=&quot;FluentValidation&quot; Version=&quot;10.4.0&quot; /&gt;
</code></pre>
I accidently added additional package:
<pre><code>&lt;PackageReference Include=&quot;FluentValidation.AspNetCore&quot; Version=&quot;10.4.0&quot; /&gt;
</code></pre>
and then my code broke.
It seems FluentValidation.AspNetCore is not compatible with Blazor Client Project - Microsoft.NET.Sdk.BlazorWebAssembly which reference the librabry Project.Application.csproj so be aware of all projects referenced in your Blazor project so they don't contain incompatible packages.

Trying to migrate from ASP.NET Core 3.1 to 5.0 using this <a href="https://learn.microsoft.com/en-us/aspnet/core/migration/31-to-50?view=aspnetcore-3.1&amp;tabs=visual-studio" rel="noreferrer">guide</a> provided by Microsoft.
Installed SDK 5.0.100-rc.1 with runtimes. Updated project as guide says and still getting following error:
<pre><code>There was no runtime pack for Microsoft.AspNetCore.App available for the specified RuntimeIdentifier 'browser-wasm'
</code></pre>
Project file:
<pre><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk.BlazorWebAssembly&quot;&gt;
 &lt;PropertyGroup&gt;
 &lt;TargetFramework&gt;net5.0&lt;/TargetFramework&gt;
 &lt;UserSecretsId&gt;*****&lt;/UserSecretsId&gt;
 &lt;/PropertyGroup&gt;
...
</code></pre>
Cant find anything asociated with this error. I have no idea where to search for more info.
Thank you for any idea.

There was no runtime pack for Microsoft.AspNetCore.App available for the specified RuntimeIdentifier 'browser-wasm'

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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使用微软提供的这个ASP.NET ，试图从MicrosoftCore3.1迁移到5.0。安装了带有运行时的SDK5.0.100-rc.1。如指南所示，已更新的项目仍有以下错误：There was no runtime pack for Microsoft.AspNetCore.App available for the...

问对于指定的Microsoft.AspNetCore.App 'browser-wasm‘，没有可用的运行时包。
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问对于指定的Microsoft.AspNetCore.App 'browser-wasm‘，没有可用的运行时包。EN