title: Unable to restore nuget packages on VS17 and VS15
body: <p>It is my first time ever working with Microsoft Visual Studio or .NET Frameworks.</p>
  
  <p>When I try building this solution (<a href="https://github.com/QuantConnect/Lean" rel="nofollow noreferrer">https://github.com/QuantConnect/Lean</a>) for the first time - I tried both versions of the solution (VS17 and VS15) on their respective software - I get the following errors (featured at the end of this post for relevance reasons).</p>
  
  <p>From these errors I get there are <strong>issues in restoring the nuget packages</strong>, but <strong>when I try installing/reinstalling/updating a package such as QLNet from the included Nuget Package Manager Console, I get</strong> errors such as:</p>
  
  <blockquote>
    <p>PM> Install-Package QLNet -Version 1.9.2
        Attempting to gather dependency information for package 'QLNet.1.9.2' with respect to project 'QuantConnect.Lean.Launcher',
    targeting '.NETFramework,Version=v4.5.2'
        Attempting to resolve dependencies for package 'QLNet.1.9.2' with DependencyBehavior 'Lowest'
        Resolving actions to install package 'QLNet.1.9.2'
        Resolved actions to install package 'QLNet.1.9.2'
        Removed package 'QLNet.1.10.0' from 'packages.config'
        Successfully uninstalled 'QLNet.1.10.0' from QuantConnect.Lean.Launcher
        Package 'QLNet.1.9.2' already exists in folder 'C:\Users\Work\QuantConnect\Lean-master\packages'
        Install failed. Rolling back...
        Package 'QLNet.1.9.2' does not exist in project 'QuantConnect.Lean.Launcher'
        Package 'QLNet.1.10.0' already exists in folder 'C:\Users\Work\QuantConnect\Lean-master\packages'
        Added package 'QLNet.1.10.0' to 'packages.config'
        Install-Package : Failed to add reference to 'QLNet'.
        At line:1 char:1
        + Install-Package QLNet -Version 1.9.2
        + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
            + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand</p>
  </blockquote>
  
  <p>or</p>
  
  <blockquote>
    <p>PM> Update-Package -reinstall QLNet
        Attempting to gather dependency information for multiple packages with respect to project 'QuantConnect', targeting
    '.NETFramework,Version=v4.5.2'
        Gathering dependency information took 5,32 sec
        Attempting to resolve dependencies for multiple packages.
        Resolving dependency information took 0 ms
        Resolving actions install multiple packages
        Found package 'QLNet 1.9.2' in 'C:\Users\Work\QuantConnect\Lean-master\packages'.
        Install failed. Rolling back...
        Executing nuget actions took 3,73 sec
        Update-Package : End of Central Directory record could not be found.
        At line:1 char:1
        + Update-Package -reinstall QLNet
        + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            + CategoryInfo          : NotSpecified: (:) [Update-Package], Exception
            + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.UpdatePackageCommand</p>
  </blockquote>
  
  <p>I also downloaded and executed <code>nuget.exe - recommended latest v4.4.1</code> and <code>VS 2015 VSIX - latest v3.6.0</code> from this page: <a href="https://www.nuget.org/downloads" rel="nofollow noreferrer">https://www.nuget.org/downloads</a> , but nothing has changed.</p>
  
  <p><strong>What should I do?</strong></p>
  
  <blockquote>
    <p>(This is what I get when I try building the solution: </p>
  </blockquote>
  
  <pre><code>&gt;  1&gt;------ Build started: Project: QuantConnect, Configuration: Debug Any CPU ------
  &gt;     1&gt;C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1820,5):
  &gt; warning MSB3245: Could not resolve this reference. Could not locate
  &gt; the assembly "QLNet, Version=1.9.2.0, Culture=neutral,
  &gt; processorArchitecture=MSIL". Check to make sure the assembly exists on
  &gt; disk. If this reference is required by your code, you may get
  &gt; compilation errors.
  &gt; 
  &gt; 
  &gt; 1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLDividendYieldEstimator.cs(23,7,23,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLRiskFreeRateEstimator.cs(24,7,24,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\ConstantQLUnderlyingVolatilityEstimator.cs(24,7,24,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLDividendYieldEstimator.cs(18,7,18,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLRiskFreeRateEstimator.cs(18,7,18,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\IQLUnderlyingVolatilityEstimator.cs(18,7,18,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(21,7,21,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(20,7,20,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\TradingCalendar.cs(7,7,7,12):
  &gt; error CS0246: The type or namespace name 'QLNet' could not be found
  &gt; (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(25,46,25,76):
  &gt; error CS0246: The type or namespace name
  &gt; 'GeneralizedBlackScholesProcess' could not be found (are you missing a
  &gt; using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\OptionPriceModels.cs(25,78,25,92):
  &gt; error CS0246: The type or namespace name 'IPricingEngine' could not be
  &gt; found (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(26,46,26,76):
  &gt; error CS0246: The type or namespace name
  &gt; 'GeneralizedBlackScholesProcess' could not be found (are you missing a
  &gt; using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(26,78,26,92):
  &gt; error CS0246: The type or namespace name 'IPricingEngine' could not be
  &gt; found (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(25,36,25,66):
  &gt; error CS0246: The type or namespace name
  &gt; 'GeneralizedBlackScholesProcess' could not be found (are you missing a
  &gt; using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(25,68,25,82):
  &gt; error CS0246: The type or namespace name 'IPricingEngine' could not be
  &gt; found (are you missing a using directive or an assembly reference?)
  &gt;     1&gt;C:\Users\Work\QuantConnect\Lean-master\Common\Securities\Option\QLOptionPriceModel.cs(232,46,232,59): error CS0246: The type or namespace name 'VanillaOption' could not be
  &gt; found (are you missing a using directive or an assembly reference?)
  &gt;     2&gt;------ Build started: Project: QuantConnect.Indicators, Configuration: Debug Any CPU ------
  &gt;     3&gt;------ Build started: Project: QuantConnect.Compression, Configuration: Debug Any CPU ------
  &gt;     4&gt;------ Build started: Project: QuantConnect.Queues, Configuration: Debug Any CPU ------
  &gt;     5&gt;------ Build started: Project: QuantConnect.Messaging, Configuration: Debug Any CPU ------
  &gt;     6&gt;------ Build started: Project: QuantConnect.Api, Configuration: Debug Any CPU ------
  &gt;     2&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     7&gt;------ Build started: Project: QuantConnect.Algorithm, Configuration: Debug Any CPU ------
  &gt;     7&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     7&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     8&gt;------ Build started: Project: QuantConnect.AlgorithmFactory, Configuration: Debug Any CPU ------
  &gt;     9&gt;------ Build started: Project: QuantConnect.Algorithm.CSharp, Configuration: Debug Any CPU ------
  &gt;     10&gt;------ Skipped Build: Project: QuantConnect.Algorithm.FSharp, Configuration: Debug Any CPU ------
  &gt;     10&gt;Project not selected to build for this solution configuration 
  &gt;     11&gt;------ Skipped Build: Project: QuantConnect.Algorithm.Python, Configuration: Debug Any CPU ------
  &gt;     11&gt;Project not selected to build for this solution configuration 
  &gt;     8&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     8&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     3&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     12&gt;------ Build started: Project: QuantConnect.Brokerages, Configuration: Debug Any CPU ------
  &gt;     4&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     6&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     13&gt;------ Build started: Project: QuantConnect.VisualStudio15Plugin, Configuration: Debug Any CPU ------
  &gt;     5&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     12&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     12&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
  &gt; could not be found
  &gt;     9&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     9&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.Framework\bin\Debug\QuantConnect.Algorithm.Framework.dll'
  &gt; could not be found
  &gt;     9&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     9&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     14&gt;------ Build started: Project: QuantConnect.Lean.Engine, Configuration: Debug Any CPU ------
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
  &gt; could not be found
  &gt;     14&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     15&gt;------ Build started: Project: QuantConnect.ToolBox, Configuration: Debug Any CPU ------
  &gt;     16&gt;------ Build started: Project: QuantConnect.Views, Configuration: Release Any CPU ------
  &gt;     17&gt;------ Build started: Project: QuantConnect.Jupyter, Configuration: Debug Any CPU ------
  &gt;     15&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
  &gt; could not be found
  &gt;     15&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     15&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
  &gt; could not be found
  &gt;     15&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
  &gt; could not be found
  &gt;     18&gt;------ Build started: Project: QuantConnect.Lean.Launcher, Configuration: Debug Any CPU ------
  &gt;     13&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     13&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
  &gt; could not be found
  &gt;     18&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\ToolBox\bin\Debug\QuantConnect.ToolBox.exe'
  &gt; could not be found
  &gt;     19&gt;------ Build started: Project: QuantConnect.Tests, Configuration: Debug Any CPU ------
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
  &gt; could not be found
  &gt;     17&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
  &gt; could not be found
  &gt;     16&gt;C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1820,5):
  &gt; warning MSB3270: There was a mismatch between the processor
  &gt; architecture of the project being built "MSIL" and the processor
  &gt; architecture of the reference "Geckofx-Core, Version=45.0.6.0,
  &gt; Culture=neutral, PublicKeyToken=3209ac31600d1857,
  &gt; processorArchitecture=x86", "x86". This mismatch may cause runtime
  &gt; failures. Please consider changing the targeted processor architecture
  &gt; of your project through the Configuration Manager so as to align the
  &gt; processor architectures between your project and references, or take a
  &gt; dependency on references with a processor architecture that matches
  &gt; the targeted processor architecture of your project.
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
  &gt; could not be found
  &gt;     16&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm.CSharp\bin\Debug\QuantConnect.Algorithm.CSharp.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Algorithm\bin\Debug\QuantConnect.Algorithm.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\AlgorithmFactory\bin\Debug\QuantConnect.AlgorithmFactory.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Api\bin\Debug\QuantConnect.Api.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Brokerages\bin\Debug\QuantConnect.Brokerages.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Common\bin\Debug\QuantConnect.Common.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Compression\bin\Debug\QuantConnect.Compression.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Indicators\bin\Debug\QuantConnect.Indicators.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Engine\bin\Debug\QuantConnect.Lean.Engine.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Launcher\bin\Debug\QuantConnect.Lean.Launcher.exe'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Messaging\bin\Debug\QuantConnect.Messaging.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\Queues\bin\Debug\QuantConnect.Queues.dll'
  &gt; could not be found
  &gt;     19&gt;CSC : error CS0006: Metadata file 'C:\Users\Work\QuantConnect\Lean-master\ToolBox\bin\Debug\QuantConnect.ToolBox.exe'
  &gt; could not be found
  &gt;     ========== Build: 0 succeeded, 17 failed, 2 up-to-date, 2 skipped ==========
  &gt; 
  &gt; 
  </code></pre>
  
  <p>)</p>