你可以使用ReSharper 2019.1.1来实现。

右键单击项目>重构>删除未使用的引用。

如果你的项目很小，你也可以使用:项目>优化使用的引用…

弹出一个窗口。选择所有引用并删除它们。然后返回并重新添加那些导致编译器错误的代码。

我不认为有一个默认的方法来发现这一点。主要原因是这些包可以做各种各样的事情，从引用程序集到向项目注入源代码。你可能想检查一下Nuget。扩展。codeplex上的以下线程讨论了nuget包的审计报告。

http://nuget.codeplex.com/discussions/429694

(NuGet已从Codeplex移动到GitHub。以上档案链接:) https://web.archive.org/web/20171212202557/http://nuget.codeplex.com:80/discussions/429694

在Visual Studio 2019中，从最新版本和Visual Studio 2022开始，您可以删除之前评论中报道的未使用的包，但仅限于SDK风格的项目。 如果你尝试旧的项目，比如。net Framework，你不会看到这个选项。 为了验证，你可以创建两个简单的控制台应用:一个使用。net Core或更高版本，另一个使用。net Framework 4.7或4.8。

请参考:删除未使用的引用

在visual studio 2019中右键单击Dotnet核心项目，您将看到一个删除未使用引用的选项。

这是体力劳动，但很有效。

使用ReSharper或类似的代码分析工具来识别项目中任何未使用的引用，并卸载相应项目中的nuget。 有时卸载的NuGet仍然停留在“管理NuGet包”对话框中的“已安装包”和“更新”列表中。关闭Visual Studio，然后删除packages文件夹，然后重新打开解决方案并恢复您的块。

下面是一个小PowerShell脚本，它为。net Core / . net 5+项目查找多余的NuGet包。对于每个项目文件，它删除每个引用一次，并检查它是否编译。这要花很多时间。在此之后，您将得到可能被排除的每个引用的摘要。最后，应该删除哪些内容是由你决定的。大多数情况下，您不可能删除它建议的所有内容(由于依赖关系)，但它应该为您提供一个良好的起点。

将下面的脚本保存为ps1文件，并将第89行中的字符串C:\MySolutionDirectory替换为您想要扫描的目录，然后运行ps1文件。先做备份，以防出现问题。

function Get-PackageReferences {
    param($FileName, $IncludeReferences, $IncludeChildReferences)

    $xml = [xml] (Get-Content $FileName)

    $references = @()

    if($IncludeReferences) {
        $packageReferences = $xml | Select-Xml -XPath "Project/ItemGroup/PackageReference"

        foreach($node in $packageReferences)
        {
            if($node.Node.Include)
            {
                if($node.Node.Version)
                {
                    $references += [PSCustomObject]@{
                        File = (Split-Path $FileName -Leaf);
                        Name = $node.Node.Include;
                        Version = $node.Node.Version;
                    }
                }
            }
        }
    }

    if($IncludeChildReferences)
    {
        $projectReferences = $xml | Select-Xml -XPath "Project/ItemGroup/ProjectReference"

        foreach($node in $projectReferences)
        {
            if($node.Node.Include)
            {
                $childPath = Join-Path -Path (Split-Path $FileName -Parent) -ChildPath $node.Node.Include

                $childPackageReferences = Get-PackageReferences $childPath $true $true

                $references += $childPackageReferences
            }
        }   
    }

    return $references
}

function Get-ProjectReferences {
    param($FileName, $IncludeReferences, $IncludeChildReferences)

    $xml = [xml] (Get-Content $FileName)

    $references = @()

    if($IncludeReferences) {
        $projectReferences = $xml | Select-Xml -XPath "Project/ItemGroup/ProjectReference"

        foreach($node in $projectReferences)
        {
            if($node.Node.Include)
            {
                $references += [PSCustomObject]@{
                    File = (Split-Path $FileName -Leaf);
                    Name = $node.Node.Include;
                }
            }
        }
    }

    if($IncludeChildReferences)
    {
        $projectReferences = $xml | Select-Xml -XPath "Project/ItemGroup/ProjectReference"

        foreach($node in $projectReferences)
        {
            if($node.Node.Include)
            {
                $childPath = Join-Path -Path (Split-Path $FileName -Parent) -ChildPath $node.Node.Include

                $childProjectReferences = Get-ProjectReferences $childPath $true $true

                $references += $childProjectReferences
            }
        }   
    }

    return $references
}

$files = Get-ChildItem -Path C:\MySolutionDirectory -Filter *.csproj -Recurse

Write-Output "Number of projects: $($files.Length)"

$stopWatch = [System.Diagnostics.Stopwatch]::startNew()

$obseletes = @()

foreach($file in $files) {

    Write-Output ""
    Write-Output "Testing project: $($file.Name)"

    $rawFileContent = [System.IO.File]::ReadAllBytes($file.FullName)

    $childPackageReferences = Get-PackageReferences $file.FullName $false $true
    $childProjectReferences = Get-ProjectReferences $file.FullName $false $true

    $xml = [xml] (Get-Content $file.FullName)

    $packageReferences = $xml | Select-Xml -XPath "Project/ItemGroup/PackageReference"
    $projectReferences = $xml | Select-Xml -XPath "Project/ItemGroup/ProjectReference"

    $nodes = @($packageReferences) + @($projectReferences)

    foreach($node in $nodes)
    {
        $previousNode = $node.Node.PreviousSibling
        $parentNode = $node.Node.ParentNode
        $parentNode.RemoveChild($node.Node) > $null

        if($node.Node.Include)
        {
            $xml.Save($file.FullName)

            if($node.Node.Version)
            {
                $existingChildInclude = $childPackageReferences | Where-Object { $_.Name -eq $node.Node.Include -and $_.Version -eq $node.Node.Version } | Select-Object -First 1

                if($existingChildInclude)
                {
                    Write-Output "$($file.Name) references package $($node.Node.Include) ($($node.Node.Version)) that is also referenced in child project $($existingChildInclude.File)."
                    continue
                }
                else 
                {
                    Write-Host -NoNewline "Building $($file.Name) without package $($node.Node.Include) ($($node.Node.Version))... "
                }
            }
            else
            {
                $existingChildInclude = $childProjectReferences | Where-Object { $_.Name -eq $node.Node.Include } | Select-Object -First 1

                if($existingChildInclude)
                {
                    Write-Output "$($file.Name) references project $($node.Node.Include) that is also referenced in child project $($existingChildInclude.File)."
                    continue
                }
                else 
                {
                    Write-Host -NoNewline "Building $($file.Name) without project $($node.Node.Include)... "
                }
            }
        }
        else 
        {
            continue
        }

        dotnet build $file.FullName > $null

        if($LastExitCode -eq 0)
        {
            Write-Output "Building succeeded."

            if($node.Node.Version)
            {
                $obseletes += [PSCustomObject]@{
                    File = $file;
                    Type = 'Package';
                    Name = $node.Node.Include;
                    Version = $node.Node.Version;
                }
            }
            else
            {
                $obseletes += [PSCustomObject]@{
                    File = $file;
                    Type = 'Project';
                    Name = $node.Node.Include;
                }
            }
        }
        else 
        {
            Write-Output "Building failed."
        }


        if($null -eq $previousNode)
        {
            $parentNode.PrependChild($node.Node) > $null
        } 
        else 
        {
            $parentNode.InsertAfter($node.Node, $previousNode.Node) > $null
        }

        # $xml.OuterXml

        $xml.Save($file.FullName)
    }

    [System.IO.File]::WriteAllBytes($file.FullName, $rawFileContent)

    dotnet build $file.FullName > $null

    if($LastExitCode -ne 0)
    {
        Write-Error "Failed to build $($file.FullName) after project file restore. Was project broken before?"
        return
    }
}

Write-Output ""
Write-Output "-------------------------------------------------------------------------"
Write-Output "Analyse completed in $($stopWatch.Elapsed.TotalSeconds) seconds"
Write-Output "$($obseletes.Length) reference(s) could potentially be removed."

$previousFile = $null
foreach($obselete in $obseletes)
{
    if($previousFile -ne $obselete.File)
    {
        Write-Output ""
        Write-Output "Project: $($obselete.File.Name)"
    }

    if($obselete.Type -eq 'Package')
    {
        Write-Output "Package reference: $($obselete.Name) ($($obselete.Version))"
    }
    else
    {
        Write-Output "Project refence: $($obselete.Name)"
    }

    $previousFile = $obselete.File
}

你可以在这里找到更多信息:https://devblog.pekspro.com/posts/finding-redundant-project-references