我今天早上已经更新了Visual Studio Code，在完成更新后，它会自动重新启动。当我右键单击任何变量，方法，类名时，没有任何选择（即“转到定义”，“重命名符号”）。搜索了一段时间后，我发现打开视图>输出可能有助于我了解发生了什么。并且我发现Omniserver没有运行，并且下面是我在“输出”窗口中得到的错误。
Starting OmniSharp server at 4/17/2019, 2:42:04 PM
Target: d:\projects\Division\Division.sln
OmniSharp server started.
Path: C:\Users\Unity3\.vscode\extensions\ms-vscode.csharp-1.19.0\.omnisharp\1.32.18\OmniSharp.exe
PID: 7508
System.IO.FileNotFoundException: Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
File name: 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
at OmniSharp.Stdio.Driver.Program.<>c__DisplayClass0_1.<Main>b__1()
at OmniSharp.HostHelpers.Start(Func`1 action)
=== Pre-bind state information ===
LOG: DisplayName = netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51
(Fully-specified)
LOG: Appbase = file:///C:/Users/Unity3/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/
LOG: Initial PrivatePath = NULL
Calling assembly : Microsoft.Extensions.Logging.Abstractions, Version=2.1.1.0, …