diff --git a/Wox.Infrastructure/StringMatcher.cs b/Wox.Infrastructure/StringMatcher.cs
index 6261d9a067..1c8f6ab0b7 100644
--- a/Wox.Infrastructure/StringMatcher.cs
+++ b/Wox.Infrastructure/StringMatcher.cs
@@ -1,4 +1,7 @@
-namespace Wox.Infrastructure
+using System;
+using JetBrains.Annotations;
+
+namespace Wox.Infrastructure
 {
     public class StringMatcher
     {
diff --git a/Wox.Infrastructure/SyntaxSuger.cs b/Wox.Infrastructure/SyntaxSuger.cs
new file mode 100644
index 0000000000..40be92fe29
--- /dev/null
+++ b/Wox.Infrastructure/SyntaxSuger.cs
@@ -0,0 +1,19 @@
+using System;
+
+namespace Wox.Infrastructure
+{
+    static class SyntaxSuger<T>
+    {
+        public static T RequireNonNull(T obj)
+        {
+            if (obj == null)
+            {
+                throw new NullReferenceException();
+            }
+            else
+            {
+                return obj;
+            }
+        }
+    }
+}
diff --git a/Wox.Infrastructure/Wox.Infrastructure.csproj b/Wox.Infrastructure/Wox.Infrastructure.csproj
index 0b1d86dae7..76c669bc22 100644
--- a/Wox.Infrastructure/Wox.Infrastructure.csproj
+++ b/Wox.Infrastructure/Wox.Infrastructure.csproj
@@ -68,6 +68,7 @@
     <Compile Include="Hotkey\KeyEvent.cs" />
     <Compile Include="Logger\Log.cs" />
     <Compile Include="Storage\PluginSettingsStorage.cs" />
+    <Compile Include="SyntaxSuger.cs" />
     <Compile Include="WoxDirectroy.cs" />
     <Compile Include="Stopwatch.cs" />
     <Compile Include="Storage\BinaryStorage.cs" />