小编Sea*_*ayn的帖子

I try to get a X509Certificate2 from a BountyCastle X509Certificate and a PKCS12. I use the following code:

 certificate = new X509Certificate2(rawData, password, storageFlags);

I generate the rawData, like the following:

using (MemoryStream pfxData = new MemoryStream())
{
   X509CertificateEntry[] chain = new X509CertificateEntry[1];

   chain[0] = new X509CertificateEntry(x509);
   pkcsStore.SetKeyEntry(applicationName, new AsymmetricKeyEntry(subjectKeyPair.Private), chain);
   pkcsStore.Save(pfxData, passcode.ToCharArray(), random);
   var rawData = pfx.ToArray();
}

The problem is, that I get the following exception:

After some days of researching, I figured out, that the problem is …

例：

我有以下代码块：

if (!int.TryParse("123", out var parsedNumber))
{
    return;
}

Console.WriteLine(parsedNumber);

控制台中的输出为：123

题：

生产线Console.WriteLine(parsedNumber);知道的可能性如何parsedNumber？

根据我的理解，parsedNumber应该仅在中提供if-block，不是吗？

如果我尝试这样做：

foreach (var data in dataList)
{
   data += "something";
}

Console.WriteLine(data);

Console.WriteLine(data);找不到data。

我认为解决方案是out参数，但是我不确定。有人可以解释吗？

我尝试使用CentOS/RedHat(Linux)在AWS EC2上安装msodbcsql17.

这些是我所遵循的步骤,来自Microsoft(LINK):

sudo su

#Download appropriate package for the OS version
#Choose only ONE of the following, corresponding to your OS version

#RedHat Enterprise Server 6
curl https://packages.microsoft.com/config/rhel/6/prod.repo > /etc/yum.repos.d/mssql-release.repo

#RedHat Enterprise Server 7
curl https://packages.microsoft.com/config/rhel/7/prod.repo > /etc/yum.repos.d/mssql-release.repo

exit
sudo yum remove unixODBC-utf16 unixODBC-utf16-devel #to avoid conflicts
sudo ACCEPT_EULA=Y yum install msodbcsql17
# optional: for bcp and sqlcmd
sudo ACCEPT_EULA=Y yum install mssql-tools
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc
# optional: …