NLog · snakefoot · Feb 1, 2025 · Feb 1, 2025
diff --git a/src/NLog/Layouts/JSON/JsonAttribute.cs b/src/NLog/Layouts/JSON/JsonAttribute.cs
@@ -34,6 +34,7 @@
 namespace NLog.Layouts
 {
    using System;
+    using System.ComponentModel;
    using System.Text;
    using NLog.Config;

@@ -133,6 +134,8 @@ public string Name
        /// If not set explicitly then the value of the parent will be used as default.
        /// </remarks>
        /// <docgen category='Layout Options' order='100' />
+        [Obsolete("Marked obsolete since forward slash are valid JSON. Marked obsolete with NLog v5.4")]
+        [EditorBrowsable(EditorBrowsableState.Never)]
        public bool EscapeForwardSlash { get => EscapeForwardSlashInternal ?? false; set => EscapeForwardSlashInternal = value; }
        internal bool? EscapeForwardSlashInternal { get; private set; }

@@ -170,7 +173,10 @@ internal bool RenderAppendJsonValue(LogEventInfo logEvent, IJsonConverter jsonCo

                if (Encode)
                {
-                    Targets.DefaultJsonSerializer.PerformJsonEscapeWhenNeeded(builder, orgLength, EscapeUnicode, EscapeForwardSlash);
+#pragma warning disable CS0618 // Type or member is obsolete
+                    var escapeForwardSlash = EscapeForwardSlash;
+#pragma warning restore CS0618 // Type or member is obsolete
+                    Targets.DefaultJsonSerializer.PerformJsonEscapeWhenNeeded(builder, orgLength, EscapeUnicode, escapeForwardSlash);
                    builder.Append('"');
                }
            }

diff --git a/src/NLog/Layouts/JSON/JsonLayout.cs b/src/NLog/Layouts/JSON/JsonLayout.cs
@@ -261,7 +261,9 @@ protected override void InitializeLayout()
                {
                    if (!attribute.EscapeForwardSlashInternal.HasValue)
                    {
+#pragma warning disable CS0618 // Type or member is obsolete
                        attribute.EscapeForwardSlash = _escapeForwardSlashInternal.Value;
+#pragma warning restore CS0618 // Type or member is obsolete
                    }
                }
            }