无法使用 C# ConfigurationManager
我有以下代码：
using System.Configuration;
namespace test
{
public partial class MyService : ServiceBase
{
public static ReadConnectionStrings()
{
ConnectionStringSettingsCollection connections =
ConfigurationManager.ConnectionStrings;
但是，它无法识别 ConfigurationManager。我直接从 此处获取此代码
所以我显然错过了一些东西，但无法确定是什么。
I have the following code:
using System.Configuration;
namespace test
{
public partial class MyService : ServiceBase
{
public static ReadConnectionStrings()
{
ConnectionStringSettingsCollection connections =
ConfigurationManager.ConnectionStrings;
However, it doesn’t recognise ConfigurationManager. I took this code directly from here
So I’m clearly missing something, but can’t identify what.
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评论（4）
您有对 System.Configuration 的引用吗？默认情况下，它不会添加到 .NET 项目中。
Do you have a reference to
System.Configuration? It's not added to .NET projects by default.我也有同样的问题。
我花了一些时间才弄清楚添加引用并不是添加使用。我必须右键单击该项目并选择“添加引用”，然后在 .NET 选项卡中选择“System.Configuration”。
效果非常好！
I was having the same issue.
It took me a little while to figure out that adding the reference is not adding the using. I had to right-click the project and select Add Reference, then pick System.Configuration in the .NET tab.
Worked like a charm!
确保您正在使用的实际
项目引用了System.Configuration。我正在从事数据访问项目，而不是表示层项目。所以我有点困惑，因为我以为我有一个参考，但实际上数据项目缺少参考。Ensure that the actual
projectyou're working in has a reference toSystem.Configuration. I was working in a data access project, not the presentation layer's project. So I was getting a bit confused because I had thought I had a reference, but in reality thedata projectwas missing the reference.我必须下载程序集参考，然后添加到项目中，不确定其他人是否有这个问题
I had to download the assembly refernce then add to project not sure if others had this problem