If I understand you correctly, you are trying to execute another program from within your Windows Forms app, and the FileInfo object you are referring to holds the file information for the executable. You should use the System.Diagnostics.Process class. For example, if your FileInfo object were called myFile:
Process myProcess = new Process();
myProcess.StartInfo.FileName = myFile.FullName;
myProcess.StartInfo.Arguments = "<your options go here";
myProcess.Start();
The Process class has a large number of other members you might find useful. I suggest looking it up in the documentation.