Refactoring

AMWD.Common/Extensions/ExceptionExtensions.cs

@@ -0,0 +1,41 @@
+using System.Linq;
+
+namespace System
+{
+	/// <summary>
+	/// Provides extension methods for exceptions.
+	/// </summary>
+	public static class ExceptionExtensions
+	{
+		/// <summary>
+		/// Returns the message of the inner exception if exists otherwise the message of the exception itself.
+		/// </summary>
+		/// <param name="exception">The exception.</param>
+		/// <returns>The message of the inner exception or the exception itself.</returns>
+		public static string GetMessage(this Exception exception)
+			=> exception.InnerException?.Message ?? exception.Message;
+
+		/// <summary>
+		/// Returns the message of the exception and its inner exceptions.
+		/// </summary>
+		/// <param name="exception">The exception.</param>
+		/// <returns>The message of the <paramref name="exception"/> and all its inner exceptions.</returns>
+		public static string GetRecursiveMessage(this Exception exception)
+		{
+			if (exception is AggregateException aggregateEx)
+			{
+				return aggregateEx.InnerExceptions
+					.Take(3)
+					.Select(ex => ex.GetRecursiveMessage())
+					.Aggregate((a, b) => a + " " + b);
+			}
+			if (exception.InnerException != null)
+			{
+				string message = exception.Message;
+				message = message.ReplaceEnd(" See the inner exception for details.", "");
+				return message + " " + exception.InnerException.GetRecursiveMessage();
+			}
+			return exception.Message;
+		}
+	}
+}