I have an input string that's generated as in following example:

string.Format("Document {0}, was saved by {1} on {2}. The process was completed 
{3} milliseconds and data was received.", 
"Document.docx", "John", "1/1/2011", 45);

Generate string looks like this then:

Document Document.docx, was saved by John on 1/1/2011. The process was completed 
45 milliseconds and data was received.

Once such a string is received from a different application, what would be the easiest way to parse with regex and extract values Document.docx, John, 1/1/2011, 45 from it.

I am looking for the easiest way to do this as we will have to parse a number of different input strings.