在这种情况下，如果你真的想在MemoryStream中简单地使用ReadToEnd方法，你可以使用这个扩展方法来实现:

public static class SetExtensions
{
    public static string ReadToEnd(this MemoryStream BASE)
    {
        BASE.Position = 0;
        StreamReader R = new StreamReader(BASE);
        return R.ReadToEnd();
    }
}

你可以这样使用这个方法:

using (MemoryStream m = new MemoryStream())
{
    //for example i want to serialize an object into MemoryStream
    //I want to use XmlSeralizer
    XmlSerializer xs = new XmlSerializer(_yourVariable.GetType());
    xs.Serialize(m, _yourVariable);

    //the easy way to use ReadToEnd method in MemoryStream
    MessageBox.Show(m.ReadToEnd());
}

为什么不在MemoryStream类型上做一个很好的扩展方法呢?

public static class MemoryStreamExtensions
{

    static object streamLock = new object();

    public static void WriteLine(this MemoryStream stream, string text, bool flush)
    {
        byte[] bytes = Encoding.UTF8.GetBytes(text + Environment.NewLine);
        lock (streamLock)
        {
            stream.Write(bytes, 0, bytes.Length);
            if (flush)
            {
                stream.Flush();
            }
        }
    }

    public static void WriteLine(this MemoryStream stream, string formatString, bool flush, params string[] strings)
    {
        byte[] bytes = Encoding.UTF8.GetBytes(String.Format(formatString, strings) + Environment.NewLine);
        lock (streamLock)
        {
            stream.Write(bytes, 0, bytes.Length);
            if (flush)
            {
                stream.Flush();
            }
        }
    }

    public static void WriteToConsole(this MemoryStream stream)
    {
        lock (streamLock)
        {
            long temporary = stream.Position;
            stream.Position = 0;
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8, false, 0x1000, true))
            {
                string text = reader.ReadToEnd();
                if (!String.IsNullOrEmpty(text))
                {
                    Console.WriteLine(text);
                }
            }
            stream.Position = temporary;
        }
    }
}

当然，在将这些方法与标准方法结合使用时要小心。:)……为了实现并发性，你需要使用那个方便的streamLock。

稍微修改了Brian的答案，允许可选的读启动管理，这似乎是最简单的方法。可能不是最有效的，但容易理解和使用。

Public Function ReadAll(ByVal memStream As MemoryStream, Optional ByVal startPos As Integer = 0) As String
    ' reset the stream or we'll get an empty string returned
    ' remember the position so we can restore it later
    Dim Pos = memStream.Position
    memStream.Position = startPos

    Dim reader As New StreamReader(memStream)
    Dim str = reader.ReadToEnd()

    ' reset the position so that subsequent writes are correct
    memStream.Position = Pos

    Return str
End Function

我需要集成一个类，需要一个流写在它:

XmlSchema schema;
// ... Use "schema" ...

var ret = "";

using (var ms = new MemoryStream())
{
    schema.Write(ms);
    ret = Encoding.ASCII.GetString(ms.ToArray());
}
//here you can use "ret"
// 6 Lines of code

我创建了一个简单的类，可以帮助减少多次使用的代码行:

public static class MemoryStreamStringWrapper
{
    public static string Write(Action<MemoryStream> action)
    {
        var ret = "";
        using (var ms = new MemoryStream())
        {
            action(ms);
            ret = Encoding.ASCII.GetString(ms.ToArray());
        }

        return ret;
    }
}

然后可以用一行代码替换示例

var ret = MemoryStreamStringWrapper.Write(schema.Write);

使用StreamReader，然后你可以使用ReadToEnd方法返回一个字符串。

在这种情况下，如果你真的想在MemoryStream中简单地使用ReadToEnd方法，你可以使用这个扩展方法来实现:

public static class SetExtensions
{
    public static string ReadToEnd(this MemoryStream BASE)
    {
        BASE.Position = 0;
        StreamReader R = new StreamReader(BASE);
        return R.ReadToEnd();
    }
}

你可以这样使用这个方法:

using (MemoryStream m = new MemoryStream())
{
    //for example i want to serialize an object into MemoryStream
    //I want to use XmlSeralizer
    XmlSerializer xs = new XmlSerializer(_yourVariable.GetType());
    xs.Serialize(m, _yourVariable);

    //the easy way to use ReadToEnd method in MemoryStream
    MessageBox.Show(m.ReadToEnd());
}