Add async task for starting a process

Common.csproj

@@ -145,6 +145,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DateTimeExtensions.cs" />
+    <Compile Include="IO\ProcessAsync.cs" />
     <Compile Include="Security.cs" />
     <Compile Include="Trace\BeginEndTracer.cs" />
     <Compile Include="Extensions\Extensions.cs" />

IO/ProcessAsync.cs

@@ -0,0 +1,33 @@
+using System.Diagnostics;
+using System.Threading.Tasks;
+
+namespace Common.IO
+{
+    public class ProcessAsync
+    {
+        public static Task RunProcessAsync(string fileName, string arguments)
+        {
+            var taskCompletionSource = new TaskCompletionSource<bool>();
+
+            var process = new Process
+            {
+                StartInfo =
+                {
+                    FileName = fileName,
+                    Arguments = arguments
+                },
+                EnableRaisingEvents = true
+            };
+
+            process.Exited += (sender, args) =>
+            {
+                taskCompletionSource.SetResult(true);
+                process.Dispose();
+            };
+
+            process.Start();
+
+            return taskCompletionSource.Task;
+        }
+    }
+}