Display .NET version ILSpy is running on in AboutPage

ILSpy/AboutPage.cs

@@ -61,6 +61,9 @@ namespace ICSharpCode.ILSpy
 			};
 			output.WriteLine(Resources.ILSpyVersion + RevisionClass.FullVersion);
 
+			string prodVersion = System.Diagnostics.FileVersionInfo.GetVersionInfo(typeof(Uri).Assembly.Location).ProductVersion;
+			output.WriteLine(Resources.NETFrameworkVersion + prodVersion);
+
 			if (StorePackageHelper.HasPackageIdentity)
 			{
 				output.WriteLine($"Package Name: {StorePackageHelper.GetPackageFamilyName()}");

ILSpy/Properties/Resources.Designer.cs

@@ -1776,6 +1776,15 @@ namespace ICSharpCode.ILSpy.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to .NET version .
+        /// </summary>
+        public static string NETFrameworkVersion {
+            get {
+                return ResourceManager.GetString("NETFrameworkVersion", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to New list.
         /// </summary>

ILSpy/Properties/Resources.resx

@@ -609,6 +609,9 @@ Are you sure you want to continue?</value>
   <data name="Misc" xml:space="preserve">
     <value>Misc</value>
   </data>
+  <data name="NETFrameworkVersion" xml:space="preserve">
+    <value>.NET version </value>
+  </data>
   <data name="Name" xml:space="preserve">
     <value>Name</value>
   </data>