为什么不通过NuGet monodevelop安装mongodriver？

Question

当我在MonoDevelop中创建一个控制台项目并尝试通过NuGet添加一个包时，我的应用程序停止并显示此错误：

Adding 'MongoDB.Bson 2.1.0' to NugetEx.
Could not install package 'MongoDB.Bson 2.1.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.0', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
System.InvalidOperationException: Could not install package 'MongoDB.Bson 2.1.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.0', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
  at NuGet.ProjectManager.ExtractPackageFilesToProject (IPackage package) [0x00000] in <filename unknown>:0 
  at NuGet.ProjectManager.AddPackageReferenceToProject (IPackage package) [0x00000] in <filename unknown>:0 
  at NuGet.ProjectManager.Execute (NuGet.PackageOperation operation) [0x00000] in <filename unknown>:0 
  at NuGet.ProjectManager.Execute (IPackage package, IPackageOperationResolver resolver) [0x00000] in <filename unknown>:0 
  at NuGet.ProjectManager.AddPackageReference (IPackage package, Boolean ignoreDependencies, Boolean allowPrereleaseVersions) [0x00000] in <filename unknown>:0 
  at NuGet.ProjectManager.AddPackageReference (System.String packageId, NuGet.SemanticVersion version, Boolean ignoreDependencies, Boolean allowPrereleaseVersions) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.SharpDevelopPackageManager.AddPackageReference (IPackage package, Boolean ignoreDependencies, Boolean allowPrereleaseVersions) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.SharpDevelopPackageManager.InstallPackage (IPackage package, ICSharpCode.PackageManagement.InstallPackageAction installAction) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.PackageManagementProject.InstallPackage (IPackage package, ICSharpCode.PackageManagement.InstallPackageAction installAction) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.InstallPackageAction.ExecuteCore () [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.ProcessPackageAction.Execute () [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.PackageActionRunner.Run (IPackageAction action) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.PackageViewModel.InstallPackage (IEnumerable`1 packageOperations) [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.PackageViewModel.InstallPackage () [0x00000] in <filename unknown>:0 
  at ICSharpCode.PackageManagement.PackageViewModel.TryInstallingPackage () [0x00000] in <filename unknown>:0

Answer 1

阅读错误信息的那一部分：

  

无法安装软件包＆＃39; MongoDB.Bson 2.1.0＆＃39;。你正试图   将此包安装到目标项目中   ＆＃39; .NETFramework，版本= 4.0版＆＃39;

如果我们看一下official driver page，我们可以确认Mongo 2.1.0和.Net4确实不兼容：

  

如上表所示，您应该安装1.10版本。

但是，NuGet上似乎没有该版本。您必须在GitHub page for version 1.10

上手动下载

我验证NuGet上的版本是否可用的方式是使用以下命令：

Get-Package Mongo.BSon -ListAvailable -AllVersions

如果可用，您可以使用以下方法安装特定版本：

Install-Package Mongo.BSon -Version 1.10