StreamReader不带字符串吗？

Question

I'm trying to read a file with a StreamReader, but I get an error for using path

Argument 1: cannot convert from 'string' to System.IO.Stream

even though it's clear from the documentation , that you should be able to use a string.
What am I missing here?

public MyClass Load(String path)
{
    try
    {
        // exception in this line, `path` is underlined with red
        using (StreamReader reader = new StreamReader(path)) 
        {
            String line = reader.ReadLine();
// ... etc

Answer 1

我无法告诉您答案是否正确，但UWP的正确语法如下：

using (var sr = new StreamReader(new FileStream(filenamestring, FileMode.Open)))