It is more intuitive (and informative, given the parameter name) that null (or empty) arguments throw ArgumentNullException.

Author: asbjornu

GitVersionCore/Helpers/ProcessHelper.cs

@@ -32,7 +32,7 @@ public static Process Start(ProcessStartInfo startInfo)
         public static int Run(Action<string> output, Action<string> errorOutput, TextReader input, string exe, string args, string workingDirectory, params KeyValuePair<string, string>[] environmentalVariables)
         {
             if (String.IsNullOrEmpty(exe))
-                throw new FileNotFoundException();
+                throw new ArgumentNullException("exe");
             if (output == null)
                 throw new ArgumentNullException("output");