diff --git a/.gitignore b/.gitignore
index 685d036ff..176b4bb21 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,3 +66,4 @@ _packages/
 
 /mm/src/boot/build.c
 /mm/windows/properties.h
+/clang-format.exe
diff --git a/run-clang-format.ps1 b/run-clang-format.ps1
index 38d4d1422..3de9fa4da 100644
--- a/run-clang-format.ps1
+++ b/run-clang-format.ps1
@@ -1,3 +1,4 @@
+Using Namespace System
 $url = "https://github.com/llvm/llvm-project/releases/download/llvmorg-14.0.6/LLVM-14.0.6-win64.exe"
 $llvmInstallerPath = ".\LLVM-14.0.6-win64.exe"
 $clangFormatFilePath = ".\clang-format.exe"