diff --git a/src/libraries/Microsoft.Extensions.Configuration.Binder/src/BinderOptions.cs b/src/libraries/Microsoft.Extensions.Configuration.Binder/src/BinderOptions.cs
index f497741c678f8..f5ffd6eb5758f 100644
--- a/src/libraries/Microsoft.Extensions.Configuration.Binder/src/BinderOptions.cs
+++ b/src/libraries/Microsoft.Extensions.Configuration.Binder/src/BinderOptions.cs
@@ -15,7 +15,7 @@ public class BinderOptions
         public bool BindNonPublicProperties { get; set; }
 
         /// <summary>
-        /// When false (the default), no exceptios are thrown when a configuration key is found for which the
+        /// When false (the default), no exceptions are thrown when a configuration key is found for which the
         /// provided model object does not have an appropriate property which matches the key's name.
         /// When true, an <see cref="System.InvalidOperationException"/> is thrown with a description
         /// of the missing properties.
diff --git a/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs b/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
index f6d62fbe02990..6216b236d40fa 100644
--- a/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
+++ b/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs
@@ -209,14 +209,14 @@ private static void BindNonScalar(this IConfiguration configuration, object inst
         {
             if (instance != null)
             {
-                var modelProperties = GetAllProperties(instance.GetType()).ToList();
+                List<PropertyInfo> modelProperties = GetAllProperties(instance.GetType()).ToList();
 
                 if (options.ErrorOnUnknownConfiguration)
                 {
                     HashSet<string> propertyNames = new(modelProperties.Select(mp => mp.Name),
                         StringComparer.OrdinalIgnoreCase);
 
-                    var missingPropertyNames = configuration.GetChildren()
+                    List<string> missingPropertyNames = configuration.GetChildren()
                         .Where(cs => !propertyNames.Contains(cs.Key))
                         .Select(mp => $"'{mp.Key}'")
                         .ToList();
diff --git a/src/libraries/Microsoft.Extensions.Primitives/src/Resources/Strings.resx b/src/libraries/Microsoft.Extensions.Primitives/src/Resources/Strings.resx
index 197852e21f0f9..1720724dba430 100644
--- a/src/libraries/Microsoft.Extensions.Primitives/src/Resources/Strings.resx
+++ b/src/libraries/Microsoft.Extensions.Primitives/src/Resources/Strings.resx
@@ -132,4 +132,7 @@
   <data name="Capacity_NotUsedEntirely" xml:space="preserve">
     <value>Entire reserved capacity was not used. Capacity: '{0}', written '{1}'.</value>
   </data>
+  <data name="Error_MissingConfig" xml:space="preserve">
+    <value>'{0}' was set on the provided {1}, but the following properties were not found on the instance of {2}: {3}</value>
+  </data>
 </root>
\ No newline at end of file