diff --git a/ILRuntime/Runtime/Enviorment/CrossBindingCodeGenerator.cs b/ILRuntime/Runtime/Enviorment/CrossBindingCodeGenerator.cs
index a779313f..16c6e7b5 100644
--- a/ILRuntime/Runtime/Enviorment/CrossBindingCodeGenerator.cs
+++ b/ILRuntime/Runtime/Enviorment/CrossBindingCodeGenerator.cs
@@ -6,7 +6,6 @@
 using ILRuntime.CLR.TypeSystem;
 using ILRuntime.Runtime.Intepreter;
 using System.Reflection;
-using System.Data.SqlTypes;
 using System.Threading;
 
 namespace ILRuntime.Runtime.Enviorment