C# 尝试生成时出现CS1003和CS1026语法错误

我不确定为什么会出现此错误。我正在尝试在Visual Studio上构建此错误。我是新手，但我需要构建此代码

以下是我的错误和代码：

（30,19）：错误CS1003:语法错误，'（'应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（30,88）：错误CS1026:）应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（31,19）：错误CS1003:语法错误，'（'应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（31,51）：预计出现错误CS1026:）

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（36,23）：错误CS1003:语法错误，'（'应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（36,63）：错误CS1026:）应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（37,23）：错误CS1003:语法错误，'（'应为

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

（37156）：应为错误CS1026:）

namespace MelonLoader.AssemblyGenerator
{
    public static class DownloaderAndUnpacker
    {
        public static void Run(string url, string targetVersion, string currentVersion, string destinationFolder, string tempFile)
        {
            if (targetVersion == currentVersion)
            {
                Logger.Log($"{destinationFolder} already contains required version, skipping download");
                return;
            }
            
            Logger.Log($"Cleaning {destinationFolder}");
            foreach (var entry in Directory.EnumerateFileSystemEntries(destinationFolder))
            {
                if (Directory.Exists(entry))
                    Directory.Delete(entry, true);
                else
                    File.Delete(entry);
            }

            Logger.Log($"Downloading {url} to {tempFile}");
            Program.webClient.DownloadFile(url, tempFile);
            Logger.Log($"Extracting {tempFile} to {destinationFolder}");
            
/*line 30*/ using var stream = new FileStream(tempFile, FileMode.Open, FileAccess.Read);
            using var zip = new ZipArchive(stream);
            
            foreach (var zipArchiveEntry in zip.Entries)
            {
                Logger.Log($"Extracting {zipArchiveEntry.FullName}");
                using var entryStream = zipArchiveEntry.Open();
                using var targetStream = new FileStream(Path.Combine(destinationFolder, zipArchiveEntry.FullName), FileMode.OpenOrCreate, FileAccess.Write);
                entryStream.CopyTo(targetStream);
            }
        }
    }
}

这似乎是C#8“使用声明”；您可能有最新的编译器可用，但您的csproj配置为使用低级C#；编辑cspoj以更新或添加以下内容是可能的：

8

（或更高，在

元素内）

我会修好的

如果你不能使用C#8，那么：

使用（var stream=new FileStream（tempFile，FileMode.Open，FileAccess.Read））
使用（var-zip=new-ZipArchive（流））
{
foreach（zip.Entries中的var zipArchiveEntry）
{
Logger.Log（$“正在提取{zipArchiveEntry.FullName}”）；
使用（var entryStream=zipArchiveEntry.Open（））
使用（var targetStream=newfilestream（Path.Combine（destinationFolder，zipArchiveEntry.FullName），FileMode.OpenOrCreate，FileAccess.Write））
{
CopyTo（targetStream）；
}
}
}

这似乎是C#8“使用声明”；您可能有最新的编译器可用，但您的csproj配置为使用低级C#；编辑cspoj以更新或添加以下内容是可能的：

8

（或更高，在

元素内）

我会修好的

如果你不能使用C#8，那么：

使用（var stream=new FileStream（tempFile，FileMode.Open，FileAccess.Read））
使用（var-zip=new-ZipArchive（流））
{
foreach（zip.Entries中的var zipArchiveEntry）
{
Logger.Log（$“正在提取{zipArchiveEntry.FullName}”）；
使用（var entryStream=zipArchiveEntry.Open（））
使用（var targetStream=newfilestream（Path.Combine（destinationFolder，zipArchiveEntry.FullName），FileMode.OpenOrCreate，FileAccess.Write））
{
CopyTo（targetStream）；
}
}
}

您正在使用哪个版本的Visual Studio？第30行在哪里？您发布的代码中的哪一行与错误消息中的第30行相对应？我想您没有使用C#8.0。using语句使用的语法需要C#8.0。因此，我的问题是关于VisualStudio版本。可能您需要启用C#8.0或第30行：使用var stream=new FileStream（tempFile、FileMode.Open、FileAccess.Read）；第31行：使用var-zip=new-ZipArchive（流）；第36行：使用var entryStream=zipArchiveEntry.Open（）；第37行：使用var targetStream=new FileStream（Path.Combine（destinationFolder，zipArchiveEntry.FullName），FileMode.OpenOrCreate，FileAccess.Write）；您正在使用哪个版本的Visual Studio？第30行在哪里？您发布的代码中的哪一行对应于错误消息中的第30行？我想您没有使用C#8.0。using语句使用的语法需要C#8.0。因此，我的问题是关于VisualStudio版本。可能您需要启用C#8.0或第30行：使用var stream=new FileStream（tempFile、FileMode.Open、FileAccess.Read）；第31行：使用var-zip=new-ZipArchive（流）；第36行：使用var entryStream=zipArchiveEntry.Open（）；第37行：使用var targetStream=new FileStream（Path.Combine（destinationFolder，zipArchiveEntry.FullName），FileMode.OpenOrCreate，FileAccess.Write）；