made all the helpers to readonly record struct for performance boost.

src/SharpOutcome/Helpers/BadOutcome.cs

@@ -5,13 +5,13 @@ namespace SharpOutcome.Helpers;
 /// </summary>
 /// <param name="Tag">The unique tag of the bad outcome.</param>
 /// <param name="Reason">The reason for the bad outcome (optional).</param>
-public record BadOutcome(BadOutcomeTag Tag, string? Reason = null) : IBadOutcome;
-
+public readonly record struct BadOutcome(BadOutcomeTag Tag, string? Reason = null) : IBadOutcome;
 
 /// <summary>
 /// Represents a bad outcome.
 /// </summary>
 /// <typeparam name="TOutcomeTag">The type of the bad outcome.</typeparam>
 /// <param name="Tag">The unique tag of the bad outcome.</param>
 /// <param name="Reason">The reason for the bad outcome (optional).</param>
-public record BadOutcome<TOutcomeTag>(TOutcomeTag Tag, string? Reason = null) : IBadOutcome<TOutcomeTag>;
+public readonly record struct BadOutcome<TOutcomeTag>(TOutcomeTag Tag, string? Reason = null)
+    : IBadOutcome<TOutcomeTag>;

src/SharpOutcome/Helpers/BadOutcomeWithPayload.cs

@@ -7,7 +7,7 @@ namespace SharpOutcome.Helpers;
 /// <param name="Tag">The unique tag of the bad outcome.</param>
 /// <param name="Payload">The payload that carries contextual data.</param>
 /// <param name="Reason">The reason for the bad outcome (optional).</param>
-public record BadOutcomeWithPayload<TPayload>(
+public readonly record struct BadOutcomeWithPayload<TPayload>(
     BadOutcomeTag Tag,
     TPayload Payload,
     string? Reason = null
@@ -21,7 +21,7 @@ public record BadOutcomeWithPayload<TPayload>(
 /// <param name="Payload">The payload that carries contextual data.</param>
 /// <typeparam name="TPayload">The type of the payload.</typeparam>
 /// <param name="Reason">The reason for the bad outcome (optional).</param>
-public record BadOutcomeWithPayload<TPayload, TOutcomeTag>(
+public readonly record struct BadOutcomeWithPayload<TPayload, TOutcomeTag>(
     TOutcomeTag Tag,
     TPayload Payload,
     string? Reason = null

src/SharpOutcome/Helpers/Failed.cs

@@ -3,4 +3,4 @@ namespace SharpOutcome.Helpers;
 /// <summary>
 /// Represents a generalized bad outcome.
 /// </summary>
-public readonly record struct Failed;
+public readonly record struct Failed(string? Reason = null);

src/SharpOutcome/Helpers/GoodOutcome.cs

@@ -5,13 +5,13 @@ namespace SharpOutcome.Helpers;
 /// </summary>
 /// <param name="Tag">The unique tag of the good outcome.</param>
 /// <param name="Reason">The reason for the good outcome (optional).</param>
-public record GoodOutcome(GoodOutcomeTag Tag, string? Reason = null) : IGoodOutcome;
-
+public readonly record struct GoodOutcome(GoodOutcomeTag Tag, string? Reason = null) : IGoodOutcome;
 
 /// <summary>
 /// Represents a good outcome.
 /// </summary>
 /// <typeparam name="TOutcomeTag">The type of the good outcome.</typeparam>
 /// <param name="Tag">The unique tag of the good outcome.</param>
 /// <param name="Reason">The reason for the good outcome (optional).</param>
-public record GoodOutcome<TOutcomeTag>(TOutcomeTag Tag, string? Reason = null) : IGoodOutcome<TOutcomeTag>;
+public readonly record struct GoodOutcome<TOutcomeTag>(TOutcomeTag Tag, string? Reason = null)
+    : IGoodOutcome<TOutcomeTag>;

src/SharpOutcome/Helpers/GoodOutcomeWithPayload.cs

@@ -7,7 +7,7 @@ namespace SharpOutcome.Helpers;
 /// <typeparam name="TPayload">The type of the payload.</typeparam>
 /// <param name="Payload">The payload that carries contextual data.</param>
 /// <param name="Reason">The reason for the good outcome (optional).</param>
-public record GoodOutcomeWithPayload<TPayload>(
+public readonly record struct GoodOutcomeWithPayload<TPayload>(
     GoodOutcomeTag Tag,
     TPayload Payload,
     string? Reason = null
@@ -21,7 +21,7 @@ public record GoodOutcomeWithPayload<TPayload>(
 /// <typeparam name="TPayload">The type of the payload.</typeparam>
 /// <param name="Payload">The payload that carries contextual data.</param>
 /// <param name="Reason">The reason for the good outcome (optional).</param>
-public record GoodOutcomeWithPayload<TPayload, TOutcomeTag>(
+public readonly record struct GoodOutcomeWithPayload<TPayload, TOutcomeTag>(
     TOutcomeTag Tag,
     TPayload Payload,
     string? Reason = null

src/SharpOutcome/Helpers/Successful.cs

@@ -3,4 +3,4 @@ namespace SharpOutcome.Helpers;
 /// <summary>
 /// Represents a generalized good outcome.
 /// </summary>
-public readonly record struct Successful;
+public readonly record struct Successful(string? Reason = null);

src/SharpOutcome/ValueOutcome.cs

@@ -133,7 +133,7 @@ public bool TryPickBadOutcome([NotNullWhen(true)] out TBadOutcome? badOutcome)
     /// Tries to pick the good outcome from the <see cref="ValueOutcome{TGoodOutcome, TBadOutcome}"/>.
     /// </summary>
     /// <param name="goodOutcome">When this method returns, contains the good outcome if it exists; otherwise, the default value.</param>
-    /// <param name="badOutcome">When this method returns, contains the bad outcome if the good outcome does not exists; otherwise, the default value.</param>
+    /// <param name="badOutcome">When this method returns, contains the bad outcome if the good outcome does not exist; otherwise, the default value.</param>
     /// <returns><c>true</c> if the good outcome exists; otherwise, <c>false</c>.</returns>
     public bool TryPickGoodOutcome([NotNullWhen(true)] out TGoodOutcome? goodOutcome,
         [NotNullWhen(false)] out TBadOutcome? badOutcome)
@@ -156,7 +156,7 @@ public bool TryPickGoodOutcome([NotNullWhen(true)] out TGoodOutcome? goodOutcome
     /// Tries to pick the bad outcome from the <see cref="ValueOutcome{TGoodOutcome, TBadOutcome}"/>.
     /// </summary>
     /// <param name="badOutcome">When this method returns, contains the bad outcome if it exists; otherwise, the default value.</param>
-    /// <param name="goodOutcome">When this method returns, contains the good outcome if the bad outcome does not exists; otherwise, the default value.</param>
+    /// <param name="goodOutcome">When this method returns, contains the good outcome if the bad outcome does not exist; otherwise, the default value.</param>
     /// <returns><c>true</c> if the bad outcome exists; otherwise, <c>false</c>.</returns>
     public bool TryPickBadOutcome([NotNullWhen(true)] out TBadOutcome? badOutcome,
         [NotNullWhen(false)] out TGoodOutcome? goodOutcome)