1 files changed, 31 insertions, 2 deletions
diff --git a/src/SMAPI.Toolkit/Serialization/Models/ManifestContentPackFor.cs b/src/SMAPI.Toolkit/Serialization/Models/ManifestContentPackFor.cs
index 1eb80889..f7dc8aa8 100644
--- a/src/SMAPI.Toolkit/Serialization/Models/ManifestContentPackFor.cs
+++ b/src/SMAPI.Toolkit/Serialization/Models/ManifestContentPackFor.cs
@@ -1,3 +1,5 @@
+using System.Diagnostics.CodeAnalysis;
+
 namespace StardewModdingAPI.Toolkit.Serialization.Models
 {
     /// <summary>Indicates which mod can read the content pack represented by the containing manifest.</summary>
@@ -7,9 +9,36 @@ namespace StardewModdingAPI.Toolkit.Serialization.Models
         ** Accessors
         *********/
         /// <summary>The unique ID of the mod which can read this content pack.</summary>
-        public string UniqueID { get; set; }
+        public string UniqueID { get; }
 
         /// <summary>The minimum required version (if any).</summary>
-        public ISemanticVersion MinimumVersion { get; set; }
+        public ISemanticVersion? MinimumVersion { get; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="uniqueId">The unique ID of the mod which can read this content pack.</param>
+        /// <param name="minimumVersion">The minimum required version (if any).</param>
+        public ManifestContentPackFor(string uniqueId, ISemanticVersion? minimumVersion)
+        {
+            this.UniqueID = this.NormalizeWhitespace(uniqueId);
+            this.MinimumVersion = minimumVersion;
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>Normalize whitespace in a raw string.</summary>
+        /// <param name="input">The input to strip.</param>
+#if NET5_0_OR_GREATER
+        [return: NotNullIfNotNull("input")]
+#endif
+        private string? NormalizeWhitespace(string? input)
+        {
+            return input?.Trim();
+        }
     }
 }