diff --git a/src/Mapster.Core/Mapster.Core.csproj b/src/Mapster.Core/Mapster.Core.csproj
index df7ee33b..e4407cc9 100644
--- a/src/Mapster.Core/Mapster.Core.csproj
+++ b/src/Mapster.Core/Mapster.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Lightweight library for Mapster and Mapster CodeGen</Description>
-    <TargetFrameworks>net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net7.0;net6.0;netstandard2.0</TargetFrameworks>
     <AssemblyName>Mapster.Core</AssemblyName>
     <PackageTags>mapster</PackageTags>
     <Version>1.2.1</Version>
diff --git a/src/Mapster/Interfaces/IMapFrom.cs b/src/Mapster/Interfaces/IMapFrom.cs
index f1b004c7..623b0595 100644
--- a/src/Mapster/Interfaces/IMapFrom.cs
+++ b/src/Mapster/Interfaces/IMapFrom.cs
@@ -2,8 +2,12 @@ namespace Mapster;
 
 public interface IMapFrom<TSource>
 {
+
+#if  NET6_0_OR_GREATER
     public void ConfigureMapping(TypeAdapterConfig config)
     {
         config.NewConfig(typeof(TSource), GetType());
     }
+#endif
+
 }
\ No newline at end of file
diff --git a/src/Mapster/Mapster.csproj b/src/Mapster/Mapster.csproj
index 6526c895..6be0a5c0 100644
--- a/src/Mapster/Mapster.csproj
+++ b/src/Mapster/Mapster.csproj
@@ -4,7 +4,7 @@
     <Description>A fast, fun and stimulating object to object mapper.  Kind of like AutoMapper, just simpler and way, way faster.</Description>
     <Copyright>Copyright (c) 2016 Chaowlert Chaisrichalermpol, Eric Swann</Copyright>
     <Authors>chaowlert;eric_swann</Authors>
-    <TargetFrameworks>net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net7.0;net6.0;netstandard2.0</TargetFrameworks>
     <AssemblyName>Mapster</AssemblyName>
     <Description>A fast, fun and stimulating object to object mapper. Kind of like AutoMapper, just simpler and way, way faster.</Description>
     <PackageId>Mapster</PackageId>
@@ -26,6 +26,10 @@
   <ItemGroup>
     <None Include="icon.png" Pack="true" PackagePath="\" />
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+    <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />
+  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Mapster.Core\Mapster.Core.csproj" />
   </ItemGroup>
diff --git a/src/Mapster/Utils/ReflectionUtils.cs b/src/Mapster/Utils/ReflectionUtils.cs
index 5959daa5..d8967720 100644
--- a/src/Mapster/Utils/ReflectionUtils.cs
+++ b/src/Mapster/Utils/ReflectionUtils.cs
@@ -385,4 +385,9 @@ public static bool IsInitOnly(this PropertyInfo propertyInfo)
             return setMethod.ReturnParameter.GetRequiredCustomModifiers().Contains(isExternalInitType);
         }
     }
+}
+
+namespace System.Runtime.CompilerServices
+{
+    internal static class IsExternalInit { }
 }
\ No newline at end of file