diff --git a/README.md b/README.md
index 0d51947..c09cce6 100644
--- a/README.md
+++ b/README.md
@@ -265,6 +265,8 @@ Defines the behavior that is executed when a defined enum value has no associate
 |`SnakeCasing`|Returns the enum name as a `snake_cased_string`. Assumes the name is in PascalCase.|
 |`RawValueToString`|The raw constant value itself is returned by calling `object.ToString()` on the value.|
 |`EmptyString`|Returns an empty string. This is useful if you want to implement a wrapper around the generated method and handle this case in user code.|
+|`ToLowerInvariant`|Returns the enum name lowercased (culture invariant).|
+|`ToUpperInvariant`|Returns the enum name uppercased (culture invariant).|
 
 </details>
 
diff --git a/src/EnumValues.Core/MissingValueHandling.cs b/src/EnumValues.Core/MissingValueHandling.cs
index 17d790a..0244017 100644
--- a/src/EnumValues.Core/MissingValueHandling.cs
+++ b/src/EnumValues.Core/MissingValueHandling.cs
@@ -18,5 +18,9 @@ public enum MissingValueHandling
     /// <summary>The raw constant value itself is returned by calling <see cref="object.ToString()"/> on the value.</summary>
     RawValueToString,
     /// <summary>Returns an empty string. This is useful if you want to implement a wrapper around the generated method and handle this case in user code.</summary>
-    EmptyString
+    EmptyString,
+    /// <summary>Returns the enum name lowercased (culture invariant).</summary>
+    ToLowerInvariant,
+    /// <summary>Returns the enum name uppercased (culture invariant).</summary>
+    ToUpperInvariant
 }
\ No newline at end of file
diff --git a/src/EnumValues/Generator/Models/EnumValueCase.cs b/src/EnumValues/Generator/Models/EnumValueCase.cs
index 3f505c1..6f7ca29 100644
--- a/src/EnumValues/Generator/Models/EnumValueCase.cs
+++ b/src/EnumValues/Generator/Models/EnumValueCase.cs
@@ -56,6 +56,8 @@ public static ImmutableArray<EnumValueCase> CreateMany(INamedTypeSymbol enumType
                 {
                     MissingValueHandling.ThrowMissingValueException => null,
                     MissingValueHandling.ToString => symbol.Name,
+                    MissingValueHandling.ToLowerInvariant => symbol.Name.ToLowerInvariant(),
+                    MissingValueHandling.ToUpperInvariant => symbol.Name.ToUpperInvariant(),
                     MissingValueHandling.RawValueToString => symbol.ConstantValue?.ToString() ?? "",
                     MissingValueHandling.EmptyString => "",
                     _ => CodeText.AlterCasing(symbol.Name, missingValueHandling)