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Yeah, it's my mistake. I have the solution for this, just download the nuget source to the solution folder or project folder.
How to fix error NU1100: Unable to resolve 'Microsoft.NET.Test.Sdk (>= 17.12.0)' for 'net9.0'
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(25.6, 94%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETN%3C/text%3E%3C/svg%3E)
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When I run this command:
dotnet new mstest in PowerShell (my solution and project are in VSCode), I meet this problem:
After that, following to the Manual Instruction, I run the command dotnet restore but I still meet that problem, I can't find any solution for it. Can you help me?
Developer technologies | .NET | .NET CLI
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Trần Nhân 0 Reputation points
2025-04-03T17:17:27.57+00:00 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 65%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJT%3C/text%3E%3C/svg%3E)
John Tasler 0 Reputation points2025-05-25T13:00:44.41+00:00 What do you mean? I keep getting this message on my solutions, both using
dotnet restoreand Visual Studio, although it's happening for a bunch of referenced packages. My solution root directory has anuget.configfile in it that contains the following:<?xml version="1.0" encoding="utf-8"?> <configuration> <packageSources> <clear /> <add key="nuget" value="https://api.nuget.org/v3/index.json" /> </packageSources> </configuration> -
John Tasler 0 Reputation points
2025-06-22T07:57:22.24+00:00 That seems like a strange requirement to use Nuget. I find that Nuget is great - when it works. I get very strange behavior when it doesn't work. One thing that is really strange is this message:
BlankUwpAppDotnet9.csproj : error NU1100: Unable to resolve 'Microsoft.NETCore.App.Host.win-arm64 (= 9.0.5)' for 'net9.0-windows10.0.26100'. PackageSourceMapping is enabled, the following source(s) were not considered: C:\Program Files\dotnet\library-packs, nuget.The strange thing is I have nothing in my project that references .NET 9.0.5. My machine has the 9.0.6 SDK installed. WTF???
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