ASP.Net Core: Combine Path and string Containing file name as Full Path in C#

I have two Simple string that contain path parent and contain file name, which is a separated string.

I want to combine those string in one valid string path:

Example :

Path = "C:/Servers/LOCAL/JOB TOMORI/01. SENORO - BLOCK/01. FILE 1/DATA DOKUMEN"

File = "C360_2018-01-15-13-08-32-149.jpg"

The Result that i want it shouldbe :

"C:/Servers/LOCAL/JOB TOMORI/01. SENORO - BLOCK/01. FILE 1/DATA DOKUMEN/C360_2018-01-15-13-08-32-149.jpg"

or 

C:/Servers/LOCAL/JOB TOMORI/01. SENORO - BLOCK/01. FILE 1/DATA DOKUMEN/C360_2018-01-15-13-08-32-149.jpg

public IActionResult ViewFileExplorer(string node, string path, string ext)
{
    if (ext != null)
    {
        var dir = node.Replace(@"\\", @"/");
        string combine = dir + path;
    }
    return View();
}

Thank you