Csharp 试图将从多个函数返回的外观相似的元组映射到一个变量

假设有一个带有此表单代码的库:

 public class SomeLib
{
    public (bool WasOk, string Message) DoCheck(string fileName)
    {
        // do something here to check the file. 
        return (true, "all good");
    }

    public (bool WasOk, string Message) DoCheck(byte[] fileBytes)
    {
        // do something here to check the file as bytes 
        return (true, "all good");
    }
}

使用此库的代码如下所示:

    int option = 1;

    SomeLib lib = new SomeLib();

    if (option == 0)
    {
        var res1 = lib.DoCheck("hello");
        MessageBox.Show(res1.WasOk + res1.Message);
    }
    else
    {
        var res2 = lib.DoCheck(new byte[] { });
        MessageBox.Show(res2.WasOk + res2.Message);
    }

我希望做的是将对DoCheck的两次调用返回的值存储到一个公共变量中.例如.:

    int option = 1;

    SomeLib lib = new SomeLib();

    var res; // doesn't compile, obviously

    if (option == 0)
    {
        res = lib.DoCheck("hello");                
    }
    else
    {
        res = lib.DoCheck(new byte[] { });
    }

    MessageBox.Show(res.WasOk + res.Message);  // act on the result in the same way for both branches. 

我希望这是有道理的.我想做的事可能吗？假设库中的代码不能更改.