我正在构建一个连接到多个Oracle数据库的应用程序。连接到内部网络上的数据库没有问题，但我需要连接到托管在Oracle云中的数据库。在SQL Developer中，连接是使用Oracle Wallet进行的，但我完全不知道如何在C#中使用Wallet。如果能提供一个示例，我将非常感激。

****编辑

我至少让它识别了我的TNS条目，但是我遇到了一个问题，我无法取得任何进展。

using System;
using System.Data;
using System.Data.Common;
using Oracle.ManagedDataAccess.Client;

class GetSchemaSample
{
    static void Main(string[] args)
    {
        string constr = "User Id=/; Data Source=mytns;";
        string ProviderName = "Oracle.ManagedDataAccess.Client";

        DbProviderFactory factory = DbProviderFactories.GetFactory(ProviderName);

        using (DbConnection conn = factory.CreateConnection())
        {
            try
            {
                conn.ConnectionString = constr;
                conn.Open();

                DataTable dtSchema = conn.GetSchema();
                dtSchema.WriteXml(ProviderName + "_Schema.xml");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.WriteLine(ex.StackTrace);
            }
            Console.ReadLine();
        }
    }
}

并将此添加到我的App.config中;

<oracle.manageddataaccess.client>
    <version number="*">
      <settings>
        <setting name="WALLET_LOCATION" value="c:\Oracle" />
        <setting name="SQLNET.WALLET_OVERRIDE" value="true" />
      </settings>
    </version>
  </oracle.manageddataaccess.client>

我遇到的错误是;

The path is not of a legal form.
   at System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
   at System.IO.Path.GetFullPathInternal(String path)
   at System.IO.Path.GetFullPath(String path)
   at System.IO.FileSystemWatcher.StartRaisingEvents()
   at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.CreateSEPSFileWatcher(String walletPath, String walletFile)
   at OracleInternal.ConnectionPool.OraclePoolManager.InitializeSEPSCredentials()
   at OracleInternal.ConnectionPool.OraclePoolManager.Initialize(ConnectionString cs, OracleConnection con)
   at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.GetPM(ConnectionString cs, OracleConnection con, PM conPM, ConnectionString pmCS, SecureString securedPassword, SecureString securedProxyPassword, Boolean& bAuthenticated, Boolean& newPM)
   at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.Get(ConnectionString cs, PM conPM, ConnectionString pmCS, SecureString securedPassword, SecureString securedProxyPassword, OracleConnection connRefForCriteria)
   at Oracle.ManagedDataAccess.Client.OracleConnection.Open()
   at GetSchemaSample.Main(String[] args) in C:\Users\peter.holliday\source\repos\OACTesting\Connection1.cs:line 39

我已经尝试过用我能想到的所有方法更新app.config的WALLET_LOCATION条目，以及wallet中的sqlnet.ora文件（我认为这是一个转移注意力的问题，因为app.config似乎表示要覆盖它），但我无法克服这个错误。即使是一个指针，让我如何看到错误中引用的“String walletFile”变量的值，我也会很感激。