diff --git a/src/primitives/Primitives.Tests/Primitives.Tests.csproj b/src/primitives/Primitives.Tests/Primitives.Tests.csproj
index 170e15b..b6808db 100644
--- a/src/primitives/Primitives.Tests/Primitives.Tests.csproj
+++ b/src/primitives/Primitives.Tests/Primitives.Tests.csproj
@@ -15,7 +15,7 @@
 		<PackageReference Include="NUnit" Version="3.13.2" />
 		<PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
-		<PackageReference Include="PrimeFuncPack.Primitives" Version="1.2.0-preview.1.0.0" />
+		<PackageReference Include="PrimeFuncPack.Primitives" Version="1.2.0-rc.1.0.0" />
 		<PackageReference Include="PrimeFuncPack.UnitTest.Data" Version="2.0.6" />
 	</ItemGroup>
 
diff --git a/src/primitives/Primitives/Linq/Yielder.cs b/src/primitives/Primitives/Linq/Yielder.cs
index d50279c..bc71dd1 100644
--- a/src/primitives/Primitives/Linq/Yielder.cs
+++ b/src/primitives/Primitives/Linq/Yielder.cs
@@ -1,20 +1,19 @@
 #nullable enable
 
 using System.Collections.Generic;
-using System.Runtime.CompilerServices;
 
 namespace System.Linq
 {
     public static class Yielder
     {
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static IEnumerable<T> YieldSingle<T>(T value)
-            =>
-            Yielder<T>.YieldSingle(value);
+        {
+            yield return value;
+        }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static IEnumerable<T> YieldEmpty<T>()
-            =>
-            Yielder<T>.YieldEmpty();
+        {
+            yield break;
+        }
     }
 }
diff --git a/src/primitives/Primitives/Primitives.csproj b/src/primitives/Primitives/Primitives.csproj
index c3acda1..413a317 100644
--- a/src/primitives/Primitives/Primitives.csproj
+++ b/src/primitives/Primitives/Primitives.csproj
@@ -11,7 +11,7 @@
 		<Copyright>Copyright © 2020-2021 Andrei Sergeev, Pavel Moskovoy</Copyright>
 		<RootNamespace>System</RootNamespace>
 		<AssemblyName>PrimeFuncPack.Primitives</AssemblyName>
-		<Version>1.2.0-preview.1.0.0</Version>
+		<Version>1.2.0-rc.1.0.0</Version>
 	</PropertyGroup>
 
 	<ItemGroup>