diff --git a/Dockerfile b/Dockerfile
index 87cf365a..413effba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -229,7 +229,6 @@ RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing/" >> /etc/apk/reposi
 ######################
 # Install CheckStyle #
 ######################
-
 RUN CHECKSTYLE_LATEST=$(curl -s https://api.github.com/repos/checkstyle/checkstyle/releases/latest \
     | grep browser_download_url \
     | grep ".jar" \
@@ -294,6 +293,7 @@ ENV ACTIONS_RUNNER_DEBUG=${ACTIONS_RUNNER_DEBUG} \
     VALIDATE_CLOJURE=${VALIDATE_CLOJURE} \
     VALIDATE_CLOUDFORMATION=${VALIDATE_CLOUDFORMATION} \
     VALIDATE_COFFEE=${VALIDATE_COFFEE} \
+    VALIDATE_CSHARP=${VALIDATE_CSHARP} \
     VALIDATE_CSS=${VALIDATE_CSS} \
     VALIDATE_DART=${VALIDATE_DART} \
     VALIDATE_DOCKERFILE=${VALIDATE_DOCKERFILE} \
diff --git a/README.md b/README.md
index 06e41da6..e5a3f04f 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ Developers on **GitHub** can call the **GitHub Action** to lint their code base
 | **Ansible**                      | [ansible-lint](https://github.com/ansible/ansible-lint)                                                                                                                        |
 | **Azure Resource Manager (ARM)** | [arm-ttk](https://github.com/azure/arm-ttk)                                                                                                                                    |
 | **AWS CloudFormation templates** | [cfn-lint](https://github.com/aws-cloudformation/cfn-python-lint/)                                                                                                             |
+| **C#**                           | [dotnet-format](https://github.com/dotnet/format)                                                                                                                              |
 | **CSS**                          | [stylelint](https://stylelint.io/)                                                                                                                                             |
 | **Clojure**                      | [clj-kondo](https://github.com/borkdude/clj-kondo)                                                                                                                             |
 | **CoffeeScript**                 | [coffeelint](https://coffeelint.github.io/)                                                                                                                                    |
@@ -196,7 +197,8 @@ But if you wish to select or exclude specific linters, we give you full control
 | **VALIDATE_BASH**                | `true`                | Flag to enable or disable the linting process of the Bash language.                                                                                                              |
 | **VALIDATE_CLOJURE**             | `true`                | Flag to enable or disable the linting process of the Clojure language.                                                                                                           |
 | **VALIDATE_CLOUDFORMATION**      | `true`                | Flag to enable or disable the linting process of the AWS Cloud Formation language.                                                                                               |
-| **VALIDATE_COFFEE**              | `true`                | Flag to enable or disable the linting process of the Coffeescript language .                                                                                                     |
+| **VALIDATE_COFFEE**              | `true`                | Flag to enable or disable the linting process of the Coffeescript language.                                                                                                      |
+| **VALIDATE_CSHARP**              | `true`                | Flag to enable or disable the linting process of the C# language.                                                                                                                |
 | **VALIDATE_CSS**                 | `true`                | Flag to enable or disable the linting process of the CSS language.                                                                                                               |
 | **VALIDATE_DART**                | `true`                | Flag to enable or disable the linting process of the Dart language.                                                                                                              |
 | **VALIDATE_DOCKERFILE**          | `true`                | Flag to enable or disable the linting process of the Docker language.                                                                                                            |