diff --git a/commandinjection.cs b/commandinjection.cs
new file mode 100644
index 0000000..55ad1cd
--- /dev/null
+++ b/commandinjection.cs
@@ -0,0 +1,35 @@
+using System.Diagnostics;
+
+namespace Injections
+{
+    public class OsCommandInjection
+    {
+        public void RunOsCommand(string command)
+        {
+            // ruleid: os-command-injection
+            var process = Process.Start(command);
+        }
+
+        //
+        public void RunOsCommandWithProcessParam(string command)
+        {
+            Process process = new Process();
+
+            process.StartInfo.FileName = command;
+            // ruleid: os-command-injection
+            process.Start();
+        }
+
+        public void RunConstantAppWithArgs(string args)
+        {
+            ProcessStartInfo processStartInfo = new ProcessStartInfo()
+            {
+                FileName = "constant",
+                Arguments = "constant"
+            };
+
+            // ok: os-command-injection
+            var process = Process.Start(processStartInfo);
+        }
+    }
+}