diff --git a/action.yml b/action.yml
index 0601372..293d549 100644
--- a/action.yml
+++ b/action.yml
@@ -7,28 +7,19 @@ inputs:
     default: '1'
   version:
     description: 'Value for ApplicationVersion property'
-    required: true
+    required: false
     default: '1'
   displayVersion:
     description: 'Value for ApplicationVersion property'
-    required: true
+    required: false
     default: '1.0'
+  printFile:
+    description: 'Print file content'
+    required: false
+    default: true
+#outputs:
+#  time: # id of output
+#    description: 'The time we greeted you'
 runs:
-  using: "composite"
-  steps:
-    - name: Bump ApplicationVersion (build version)
-      shell: bash
-      run: |
-        echo 'Setting ApplicationVersion (build version) to ${{ inputs.version }}'
-        sed -rn 's|(<ApplicationVersion>)(.*)(</ApplicationVersion>)|Old: \1\2\3|p' ${{ inputs.csproj }}
-        sed -rE 's|(<ApplicationVersion>)(.*)(</ApplicationVersion>)|<ApplicationVersion>${{ inputs.version }}</ApplicationVersion>|g' ${{ inputs.csproj }}
-        sed -rn 's|(<ApplicationVersion>)(.*)(</ApplicationVersion>)|New: \1\2\3|p' ${{ inputs.csproj }}   
-        
-    - name: Bump ApplicationDisplayVersion (build version)
-      shell: bash
-      run: |
-        echo 'Setting ApplicationDisplayVersion (build version) to ${{ inputs.displayVersion }}'
-        sed -rn 's|(<ApplicationDisplayVersion>)(.*)(</ApplicationDisplayVersion>)|Old: \1\2\3|p' ${{ inputs.csproj }}
-        sed -rE 's|(<ApplicationDisplayVersion>)(.*)(</ApplicationDisplayVersion>)|<ApplicationDisplayVersion>${{ inputs.displayVersion }}</ApplicationDisplayVersion>|g' ${{ inputs.csproj }}
-        sed -rn 's|(<ApplicationDisplayVersion>)(.*)(</ApplicationDisplayVersion>)|New: \1\2\3|p' ${{ inputs.csproj }}   
-
+  using: 'node16'
+  main: 'index.js'
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diff --git a/index.js b/index.js
new file mode 100644
index 0000000..d4726c9
--- /dev/null
+++ b/index.js
@@ -0,0 +1,42 @@
+
+const core = require('@actions/core');
+const github = require('@actions/github');
+
+try {
+
+    const fs = require('fs');
+
+    const csproj = core.getInput('csproj');
+    const version = core.getInput('version');
+    const displayVersion = core.getInput('displayVersion');
+    const printFile = core.getInput('printFile');
+    
+
+    // match <ApplicationVersion> followed by any sequence of characters that are not a '<', followed by </ApplicationVersion>
+    const applicationVersionPattern = /<ApplicationVersion>[^<]*<\/ApplicationVersion>/g; 
+    const applicationDisplayVersionPattern = /<ApplicationDisplayVersion>[^<]*<\/ApplicationDisplayVersion>/g; 
+    
+    if (version && version.trim() !== '') {
+        // Read the file contents
+        var fileContents = fs.readFileSync(csproj, 'utf8');
+        var updatedApplicationVersion = fileContents.replace(applicationVersionPattern, `<ApplicationVersion>${version}</ApplicationVersion>`);
+        // Write the updated contents back to the file
+        fs.writeFileSync(csproj, updatedApplicationVersion, 'utf8');
+    } 
+
+    if (displayVersion && displayVersion.trim() !== '') {
+        // Read the file contents
+        var fileContents = fs.readFileSync(csproj, 'utf8');
+        var updatedApplicationVersion = fileContents.replace(applicationDisplayVersionPattern, `<ApplicationDisplayVersion>${displayVersion}</ApplicationDisplayVersion>`);
+        // Write the updated contents back to the file
+        fs.writeFileSync(csproj, updatedApplicationVersion, 'utf8');
+    }
+
+    if(printFile) {
+        var fileContents = fs.readFileSync(csproj, 'utf8');
+        console.log(fileContents);
+    }
+} 
+catch (error) {
+    core.setFailed(error.message);
+}
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