小编fcr*_*ick的帖子

以下是我尝试过的内容和发生的事情的成绩单.

我正在寻找如何调用特定的重载以及解释为什么以下不起作用.如果您的答案是"您应该使用此命令行开关"或"两次调用",请在我不接受您的答案时理解.

PS C:\> [System.IO.Path]::Combine("C:\", "foo")
C:\foo
PS C:\> [System.IO.Path]::Combine("C:\", "foo", "bar")
Cannot find an overload for "Combine" and the argument count: "3".
At line:1 char:26
+ [System.IO.Path]::Combine <<<< ("C:\", "foo", "bar")
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

PS C:\> [System.IO.Path]::Combine(, "C:\", "foo", "bar")
Missing ')' in method call.
At line:1 char:27
+ [System.IO.Path]::Combine( <<<< , "C:\", "foo", "bar")
    + CategoryInfo          : ParserError: (CloseParenToken:TokenId) [], Paren
   tContainsErrorRecordException
    + FullyQualifiedErrorId : MissingEndParenthesisInMethodCall

PS C:\> [System.IO.Path]::Combine($("C:\", "foo", …

我有一个类,我正在序列化一些数据:

[Serializable]
public class SomeData {
    public int NumericField;
    public string StringField;
}

我有一个很好的方便的扩展方法:

public static string ToJson<T> (this T value) {
    // yay no compile-time checks for [Serializable]?
    if (!typeof(T).IsSerializable)
        throw new SerializationException("Object lacks [Serializable] attribute");

    var serializer = new DataContractJsonSerializer(typeof(T));

    using (var stream = new MemoryStream()) {
        using (var writer = JsonReaderWriterFactory.CreateJsonWriter(stream, Encoding.UTF8)) {
            serializer.WriteObject(writer, value);
        }

        return Encoding.UTF8.GetString(stream.ToArray());
    }
}

我真的很喜欢我的课程SomeData实现ISerializable,但是当我添加它时,我被告知我需要添加一个方法:

error CS0535: 'SomeData' does not implement interface member
System.Runtime.Serialization.ISerializable.GetObjectData(
System.Runtime.Serialization.SerializationInfo, 
System.Runtime.Serialization.StreamingContext)'

问题只是我希望它 …