c# - C# Process Start runs new Internet Explorer instance with file path converted into url

Question

I have the absolute path of internet explorer executable and the absolute path of an xml file, and i want to open that xml using IE. The code i wrote works fine if there aren't any instance of IE already opened. If there is an IE instance opened, IE will be launched and will convert the filesystem path in something like an URL.

First instance of IE open this path: (and works fine) C:\workingfolder\preparazioni\DichiarativiDP\RESPONSABILE CONSERVAZIONE\IPdV.xml

Next instance of IE open this path: (and fails)

http://%22c/workingfolder/preparazioni/DichiarativiDP/RESPONSABILE%20CONSERVAZIONE/IPdV.xml%22

This is my code:

 Process proc = new Process();
            proc.StartInfo.UseShellExecute = true;

            //IE executable absolute path
            proc.StartInfo.FileName = sApplication;
            //Xml file absolute path
            proc.StartInfo.Arguments = "\"" + file + "\" " + sAdditionalArguments;

            proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;     
            proc.Start();

I tried the same code calling Chrome browser and it works fine, opening a new tab every time.