小编Leo*_*unt的帖子

Intellisense 已停止为我工作，每当我运行 VSCode 时，OmniSharp 日志中都会出现此错误。

[warn]: OmniSharp.MSBuild.ProjectManager
        Failed to load project file '/Users/leogaunt/Documents/Programming/Unity/Cube Stack/Assembly-CSharp.csproj'.
/Users/leogaunt/Documents/Programming/Unity/Cube Stack/Assembly-CSharp.csproj
/Users/leogaunt/.vscode/extensions/ms-dotnettools.csharp-1.23.1/.omnisharp/1.37.0/omnisharp/.msbuild/Current/Bin/Microsoft.Common.CurrentVersion.targets(1178,5): Error: The reference assemblies for .NETFramework,Version=v4.7.1 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks

[fail]: OmniSharp.MSBuild.ProjectManager
        Attempted to update project that is not loaded: /Users/leogaunt/Documents/Programming/Unity/Cube Stack/Assembly-CSharp.csproj

我试过重新安装插件，并重新安装 VSCode，但没有奏效。

我知道我安装了 .NET Core，因为我是 Mac 用户，我知道这一点，因为当我输入dotnet --version终端时，它会输出：

3.1.401

我正在 Unity 中编程并且正在为 iOS 创建游戏。

如何使用 .NET 将字符数组的内容存储到 C# 中的文本文件中？我试过了

char[] characters = VarInput.ToCharArray();
System.IO.File.WriteAllText(@"C:\Users\leoga\Documents\Projects_Atom\Pad_Wood\WriteText2CharacterArray.txt", characters);

但它出现了一条错误消息说

参数 2：无法从 'char[]' 转换为 'string'
[C:\Users\leoga\Documents\Projects_Atom\Pad_Wood\converter.csproj]

我也试过它，File.WriteAllLines()但它仍然不起作用。我正在使用 c# 和 .NET

我正在使用 Swift 从冠状病毒 API 获取 JSON。但是，当我尝试运行代码时，出现此错误。

致命错误：在展开可选值时意外发现 nil：第 22 行

我的代码的一部分是

override func viewDidLoad() {
        super.viewDidLoad()
        
        let url = "https://api.coronavirus.data.gov.uk/v1/data?filters=areaType=nation;areaName=england&structure={%22date%22:%22date%22,%22areaName%22:%22areaName%22,%22areaCode%22:%22areaCode%22,%22newCasesByPublishDate%22:%22newCasesByPublishDate%22,%22cumCasesByPublishDate%22:%22cumCasesByPublishDate%22,%22newDeathsByDeathDate%22:%22newDeathsByDeathDate%22,%22cumDeathsByDeathDate%22:%22cumDeathsByDeathDate%22}"
        getData(from: url)
        // Do any additional setup after loading the view.
    }
    
    private func getData(from url: String) {
        
        let getfromurl = URLSession.shared.dataTask(with: URL(string: url)!, completionHandler: {data, response, error in
            guard let data = data, error == nil else{
                print("Something Went Wrong")
                return
            }
            
            //Have data
            var result: Response?
            do {
                result = try JSONDecoder().decode(Response.self, from: data)
            }
            catch{
                print("failed to …