Process.start results in file not found even though the file exists
<p>I am using following code to open an arbitrary file with an arbitrary application that is installed on the system :</p>

<pre><code>if (File.Exists(_document.DocumentFullPath))
{
    Process.Start(_document.DocumentFullPath);
}
else MessageBox.Show(string.Format("Document {0} does not exist!", _document.DocumentFullPath));
</code></pre>

<p>When I execute this code I see that the file.Exists returns true, so the file does exist. But then the corresponding application opens, for instance an image viewer or a pdf viewer depending on the file type (jpg or pdf) that I am trying to open, but it shows an error in that application that it cannot find the file. No exceptions are thrown.
This does not happen all the time but only for some files. 
If I try to open these files manually by copy pasting the content of DocumentFullPath in the explorer, then the file does open correctly in the applicable application. </p>

<p>Duh I don't understand what is wrong.
Example of a filename that don't work :</p>

<pre><code>C:\Users\stuyckp\Documents\Visual Studio 2010\Projects\WPF\FrakoKlantOpvolgingWPF\FrakoKlantOpvolgingWPF\bin\Debug\ProjectDocumenten\11339_Wigbers\6197_koelkast \big-money.jpg
</code></pre>

<p>I am running on windows 10.</p>