Added ApplicationInfoHelper

src/Elmah.Io.Client/ApplicationInfoHelper.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+
+namespace Elmah.Io.Client
+{
+    /// <summary>
+    /// A class that can provide a guess of the current application type. The class requires either >= .NET 4.5 or >= NETSTANDARD 2.0.
+    /// </summary>
+    public static class ApplicationInfoHelper
+    {
+        /// <summary>
+        /// Get the best guess of the current application type.
+        /// </summary>
+        /// <returns>Null or one of these values: aspnet, aspnetcore, console, azurefunction, service, windowsapp</returns>
+        public static string GetApplicationType()
+        {
+#if NETSTANDARD2_0_OR_GREATER || NET45_OR_GREATER || NETCOREAPP2_0_OR_GREATER
+            var assemblies = AppDomain.CurrentDomain.GetAssemblies().ToList();
+            var processName = Process.GetCurrentProcess().ProcessName;
+            if (assemblies.Exists(a => a.FullName.StartsWith("System.Web")) && (processName == "w3wp" || processName == "iisexpress"))
+                return "aspnet";
+            else if (assemblies.Exists(a => a.FullName.StartsWith("Microsoft.Azure.Functions") || a.FullName.StartsWith("Microsoft.Azure.WebJobs")))
+                return "azurefunction";
+            else if (assemblies.Exists(a => a.FullName.StartsWith("Microsoft.AspNetCore")))
+                return "aspnetcore";
+            else if (assemblies.Exists(a => a.FullName.StartsWith("System.Windows.Forms") || a.FullName.StartsWith("PresentationCore") || a.FullName.StartsWith("WindowsBase")))
+                return "windowsapp";
+            else if (!Environment.UserInteractive)
+                return "service";
+            else if (Console.OpenStandardInput() != Stream.Null)
+                return "console";
+#endif
+
+            return null;
+        }
+    }
+}

test/Elmah.Io.Client.Test/ApplicationInfoHelperTest.cs

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+using NUnit.Framework;
+
+namespace Elmah.Io.Client.Test
+{
+    public class ApplicationInfoHelperTest
+    {
+        [Test]
+        public void CanGetApplicationType() => Assert.That(ApplicationInfoHelper.GetApplicationType(), Is.EqualTo("console"));
+    }
+}