flatten Exceptions produced by ErrorState.CombineErrors

Author: BarionLP

Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <SupportedFrameworks>net9.0;net10.0</SupportedFrameworks>
     <DotNetVersion>net10.0</DotNetVersion>
-    <PackVersion>0.3.0</PackVersion>
+    <PackVersion>0.3.1</PackVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 </Project>

src/ErrorState.cs

@@ -83,7 +83,7 @@ public static ErrorState Try<TArg>(TArg arg, Action<TArg> action)
         (false, false) => Success(),
         (true, false) => a._error,
         (false, true) => b._error,
-        (true, true) => new AggregateException(a._error, b._error),
+        (true, true) => new AggregateException(a._error , b._error).Flatten(),
     };
 
     public static ErrorState<E> CombineErrors<E>(ErrorState<E> a, ErrorState<E> b, Func<E, E, E> errorCombiner) => (a._isError, b._isError) switch
@@ -108,9 +108,9 @@ public static ErrorState Try<TArg>(TArg arg, Action<TArg> action)
         (true, false, false) => a._error,
         (false, true, false) => b._error,
         (false, false, true) => c._error,
-        (true, true, false) => new AggregateException(a._error, b._error),
-        (true, false, true) => new AggregateException(a._error, c._error),
-        (false, true, true) => new AggregateException(b._error, c._error),
-        (true, true, true) => new AggregateException(a._error, b._error, c._error),
+        (true, true, false) => new AggregateException(a._error, b._error).Flatten(),
+        (true, false, true) => new AggregateException(a._error, c._error).Flatten(),
+        (false, true, true) => new AggregateException(b._error, c._error).Flatten(),
+        (true, true, true) => new AggregateException(a._error, b._error, c._error).Flatten(),
     };
 }