While deploying Sitecore Commerce to our local development installations we ran into the following errors. Could not load file or assembly System.Runtime.CompilerServices.Unsafe Version=4.0.4.1 and System.IO.Compression Version=4.2.0.0

We spent quite a bit of time getting to the root of the issue as it was only happening to some and not all developers. The fix involved the following:

• Delete your nuget cache: %userprofile%\.nuget\packages
• Uninstall/remove all .NET core you have installed (runtime + sdk)
• Reboot your machine
• Install .NET core SDK 3.1.201 - https://dotnet.microsoft.com/download/dotnet-core/3.1 
• Make sure you have the latest version of VS 2019 installed. It should be v16.5.4
• Make sure you have the .NET Core workload installed on VS2019
• Finally, make sure you have .NET Framework 4.7.1 SDK Installed
• Clean and rebuild your solution and it's ready to deploy. Make sure you `dotnet publish “project path” -o “publish path”`

Thanks to Akshay Sura, Kamruz Jaman, and Bruce Davis-Goff we were able to resolve this issue on all the troubled dev machines.

Here are a couple of links for reference which involve binding redirect:  https://github.com/StackExchange/StackExchange.Redis/issues/1128 https://developercommunity.visualstudio.com/content/problem/152947/xamarin-android-run-error-could-not-load-assembly.html

Stack Trace:

00001 12:11:03 INFO Application startup exception System.IO.FileLoadException: Could not load file or assembly 'System.IO.Compression, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) File name: 'System.IO.Compression, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) at System.Reflection.RuntimeAssembly.GetExportedTypes() at Sitecore.Framework.Configuration.Strategies.TypeStrategy`1.<>c.<Resolve>b__0_1(Assembly x) at System.Linq.Enumerable.<SelectManyIterator>d__17`2.MoveNext() at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext() at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source) at Sitecore.Framework.Configuration.Strategies.Filters.TypeEnvironmentFilter.Filter(IEnumerable`1 input) at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable`1 source, TAccumulate seed, Func`3 func) at Sitecore.Framework.Configuration.Strategies.StrategyBuilder`1.Using[TNext](IStrategy`2 next) at Sitecore.Framework.Runtime.SitecoreBootstrapConfigurationBuilder..ctor(String environmentName) at Microsoft.Extensions.DependencyInjection.RuntimeSitecoreServicesConfigurationExtensions.Bootstrap(ISitecoreServicesConfiguration sitecore, IServiceProvider hostServices, String environmentName, Action`1 config) at Sitecore.Commerce.Engine.Startup.ConfigureServices(IServiceCollection services) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services) at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices() at Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication() WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. 00001 12:11:04 INFO Host terminated unexpectedly. System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) File name: 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) File name: 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. at Microsoft.Extensions.Primitives.InplaceStringBuilder.Append(String value, Int32 offset, Int32 count) at Microsoft.Net.Http.Headers.DateTimeFormatter.ToRfc1123String(DateTimeOffset dateTime, Boolean quoted) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.DateHeaderValueManager.SetDateValues(DateTimeOffset value) at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.CreateServiceContext(IOptions`1 options, ILoggerFactory loggerFactory) at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer..ctor(IOptions`1 options, ITransportFactory transportFactory, ILoggerFactory loggerFactory) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureServer() at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication() at Microsoft.AspNetCore.Hosting.Internal.WebHost.<StartAsync>d__26.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.Hosting.WebHostExtensions.<RunAsync>d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.Hosting.WebHostExtensions.<RunAsync>d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host) at Sitecore.Commerce.Engine.Program.Main(String[] args)