diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.Array.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.Array.cs
index 83252633..6c24af61 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.Array.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.Array.cs
@@ -25,7 +25,7 @@ internal Builder AddRange([AllowNull] T[] items, int length)
         {
             var itemsLength = items?.Length ?? default;
 
-            if (InnerAllocHelper.IsWithin(length, itemsLength) is not true)
+            if (InnerAllocHelper.IsWithinLength(length, itemsLength) is not true)
             {
                 throw InnerExceptionFactory.StartSegmentIsNotWithinArray(nameof(length), length, itemsLength);
             }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.FlatArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.FlatArray.cs
index d850a53f..71d5f076 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.FlatArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.FlatArray.cs
@@ -31,7 +31,7 @@ internal Builder AddRange(FlatArray<T>? items, int length)
         private Builder InnerAddRangeChecked(
             FlatArray<T> items, int length, [CallerArgumentExpression(nameof(length))] string lengthParamName = "")
         {
-            if (InnerAllocHelper.IsWithin(length, items.length) is not true)
+            if (InnerAllocHelper.IsWithinLength(length, items.length) is not true)
             {
                 throw InnerExceptionFactory.StartSegmentIsNotWithinArray(lengthParamName, length, items.length);
             }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.ImmutableArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.ImmutableArray.cs
index 155393e3..0d3c2e77 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.ImmutableArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.ImmutableArray.cs
@@ -35,7 +35,7 @@ private Builder InnerAddRangeChecked(
         {
             var itemsLength = items.IsDefault ? default : items.Length;
 
-            if (InnerAllocHelper.IsWithin(length, itemsLength) is not true)
+            if (InnerAllocHelper.IsWithinLength(length, itemsLength) is not true)
             {
                 throw InnerExceptionFactory.StartSegmentIsNotWithinArray(lengthParamName, length, itemsLength);
             }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.List.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.List.cs
new file mode 100644
index 00000000..1de73b7c
--- /dev/null
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.AddRange.List.cs
@@ -0,0 +1,54 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace System;
+
+partial struct FlatArray<T>
+{
+    partial class Builder
+    {
+        // TODO: Add the tests and make public
+        internal Builder AddRange([AllowNull] List<T> items)
+        {
+            if (items is null || items.Count == default)
+            {
+                return this;
+            }
+
+            InnerAddRange(items, items.Count);
+            return this;
+        }
+
+        // TODO: Add the tests and make public
+        internal Builder AddRange([AllowNull] List<T> items, int length)
+        {
+            var itemsLength = items?.Count ?? default;
+
+            if (InnerAllocHelper.IsWithinLength(length, itemsLength) is not true)
+            {
+                throw InnerExceptionFactory.StartSegmentIsNotWithinArray(nameof(length), length, itemsLength);
+            }
+
+            if (items is null || items.Count == default)
+            {
+                return this;
+            }
+
+            InnerAddRange(items, length);
+            return this;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void InnerAddRange(List<T> items, int length)
+        {
+            Debug.Assert(items.Count != default);
+            Debug.Assert(length > 0 && length <= items.Count);
+
+            InnerBufferHelperEx.EnsureBufferCapacity(ref this.items, this.length, length);
+            items.CopyTo(0, this.items, this.length, length);
+            this.length += length;
+        }
+    }
+}
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.Capacity.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.Capacity.cs
index 25145c5f..7ef67e57 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.Capacity.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/FlatArray.Builder.Capacity.cs
@@ -11,7 +11,7 @@ internal int Capacity
 
             set
             {
-                if (InnerAllocHelper.IsWithin(length, value) is not true)
+                if (value >= length is not true)
                 {
                     throw InnerBuilderExceptionFactory.CapacityOutOfRange_MustBeGreaterThanOrEqualToLength(value, length);
                 }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/InnerBufferHelper/FlatArray.Builder.InnerBufferHelperEx.cs b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/InnerBufferHelper/FlatArray.Builder.InnerBufferHelperEx.cs
index 9dd43814..8270fb5c 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.Builder/InnerBufferHelper/FlatArray.Builder.InnerBufferHelperEx.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.Builder/InnerBufferHelper/FlatArray.Builder.InnerBufferHelperEx.cs
@@ -9,7 +9,6 @@ partial class Builder
     {
         private static class InnerBufferHelperEx
         {
-            // The caller MUST ensure the length and the length increase are GREATER than zero
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             internal static void EnsureBufferCapacity(
                 ref T[] array,
@@ -20,8 +19,8 @@ internal static void EnsureBufferCapacity(
                 Debug.Assert(lengthIncrease >= 0);
 
                 int newLength = unchecked(length + lengthIncrease);
-                int doubleLength = length << 1; // unchecked(length * 2);
-                int newCapacity = unchecked((uint)newLength) > unchecked((uint)doubleLength)
+                int doubleLength = InnerAllocHelper.DoubleUnchecked(length);
+                int newCapacity = InnerAllocHelper.IsWithinCapacityUnchecked(doubleLength, newLength)
                     ? newLength
                     : doubleLength;
 
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.Array.cs b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.Array.cs
index 34a2920d..b27be4cd 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.Array.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.Array.cs
@@ -17,7 +17,7 @@ internal static FlatArray<T> InternalFromArrayChecked([AllowNull] T[] source, in
     {
         var sourceLength = source?.Length ?? default;
 
-        if (InnerAllocHelper.IsSegmentWithin(start, length, sourceLength) is not true)
+        if (InnerAllocHelper.IsSegmentWithinLength(start, length, sourceLength) is not true)
         {
             throw InnerExceptionFactory.SegmentIsNotWithinArray(start, length, sourceLength);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.FlatArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.FlatArray.cs
index 9e3b16a1..2aabe9c9 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.FlatArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.FlatArray.cs
@@ -22,7 +22,7 @@ internal static FlatArray<T> From(FlatArray<T>? source, int start, int length)
 
     internal static FlatArray<T> InternalFromFlatArrayChecked(FlatArray<T> source, int start, int length)
     {
-        if (InnerAllocHelper.IsSegmentWithin(start, length, source.length) is not true)
+        if (InnerAllocHelper.IsSegmentWithinLength(start, length, source.length) is not true)
         {
             throw InnerExceptionFactory.SegmentIsNotWithinArray(start, length, source.length);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.ImmutableArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.ImmutableArray.cs
index 0e4a2b2e..edfa7d78 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.ImmutableArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.ImmutableArray.cs
@@ -26,7 +26,7 @@ internal static FlatArray<T> InternalFromImmutableArrayChecked(ImmutableArray<T>
     {
         var sourceLength = source.IsDefault ? default : source.Length;
 
-        if (InnerAllocHelper.IsSegmentWithin(start, length, sourceLength) is not true)
+        if (InnerAllocHelper.IsSegmentWithinLength(start, length, sourceLength) is not true)
         {
             throw InnerExceptionFactory.SegmentIsNotWithinArray(start, length, sourceLength);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.List.cs b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.List.cs
index 9c19d19b..4907e36b 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.List.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/FlatArray.Factory.Explicit.From.List.cs
@@ -18,7 +18,7 @@ internal static FlatArray<T> InternalFromListChecked([AllowNull] List<T> source,
     {
         var sourceLength = source?.Count ?? default;
 
-        if (InnerAllocHelper.IsSegmentWithin(start, length, sourceLength) is not true)
+        if (InnerAllocHelper.IsSegmentWithinLength(start, length, sourceLength) is not true)
         {
             throw InnerExceptionFactory.SegmentIsNotWithinArray(start, length, sourceLength);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerAllocHelper/FlatArray.InnerAllocHelper.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerAllocHelper/FlatArray.InnerAllocHelper.cs
index b4491b95..0870ff05 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerAllocHelper/FlatArray.InnerAllocHelper.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerAllocHelper/FlatArray.InnerAllocHelper.cs
@@ -9,7 +9,6 @@ private static class InnerAllocHelper
     {
         internal const int DefaultPositiveCapacity = 4;
 
-        // The caller MUST ensure the length is GREATER than or EQUAL to zero
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static bool IsIndexInRange(int index, int length)
         {
@@ -19,56 +18,75 @@ internal static bool IsIndexInRange(int index, int length)
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal static bool IsWithin(int value, int threshold)
-            =>
-            unchecked((uint)value) <= unchecked((uint)threshold);
+        internal static bool IsWithinLength(int value, int length)
+        {
+            Debug.Assert(value >= 0);
+            Debug.Assert(length >= 0);
+
+            return InnerIsWithinUnchecked(value, length);
+        }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal static bool IsSegmentWithin(int start, int length, int threshold)
+        internal static bool IsSegmentWithinLength(int segmentStart, int segmentLength, int length)
+        {
+            Debug.Assert(segmentStart >= 0);
+            Debug.Assert(segmentLength >= 0);
+            Debug.Assert(length >= 0);
+
+            return (ulong)unchecked((uint)segmentStart) + unchecked((uint)segmentLength) <= unchecked((uint)length);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal static bool IsWithinCapacityUnchecked(int value, int capacity)
             =>
-            (ulong)unchecked((uint)start) + unchecked((uint)length) <= unchecked((uint)threshold);
+            InnerIsWithinUnchecked(value, capacity);
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static int EnsurePositiveCapacity(int capacity)
-            =>
-            capacity > 0 ? capacity : DefaultPositiveCapacity;
+        {
+            Debug.Assert(capacity >= 0);
+
+            return capacity > 0 ? capacity : DefaultPositiveCapacity;
+        }
 
-        // The caller MUST ensure the capacity is GREATER than or EQUAL to zero
         internal static int EnsureCapacityWithinDefaultPositive(int capacity)
         {
             Debug.Assert(capacity >= 0);
 
-            return IsWithin(capacity, DefaultPositiveCapacity) ? capacity : DefaultPositiveCapacity;
+            return InnerIsWithinUnchecked(capacity, DefaultPositiveCapacity) ? capacity : DefaultPositiveCapacity;
         }
 
-        // The caller MUST ensure the capacity is GREATER than zero and LESS than the max capacity
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static int EnlargeCapacity(int capacity, int maxCapacity)
         {
             Debug.Assert(capacity > 0 && capacity < maxCapacity);
 
-            int newCapacity = InnerDoubleUnchecked(capacity);
-            return IsWithin(newCapacity, maxCapacity) ? newCapacity : maxCapacity;
+            int newCapacity = DoubleUnchecked(capacity);
+            return InnerIsWithinUnchecked(newCapacity, maxCapacity) ? newCapacity : maxCapacity;
         }
 
-        // The caller MUST ensure the length is GREATER than zero and LESS than or EQUAL to the capacity
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static bool IsHugeCapacity(int length, int capacity)
         {
             Debug.Assert(length > 0 && length <= capacity);
 
-            if (IsWithin(capacity, DefaultPositiveCapacity))
+            if (InnerIsWithinUnchecked(capacity, DefaultPositiveCapacity))
             {
                 return false;
             }
 
-            int doubleLength = InnerDoubleUnchecked(length);
-            return IsWithin(doubleLength, capacity);
+            int doubleLength = DoubleUnchecked(length);
+            return InnerIsWithinUnchecked(doubleLength, capacity);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private static int InnerDoubleUnchecked(int value)
+        internal static int DoubleUnchecked(int value)
             =>
             value << 1; // unchecked(value * 2);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static bool InnerIsWithinUnchecked(int value, int threshold)
+            =>
+            unchecked((uint)value) <= unchecked((uint)threshold);
     }
 }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerArrayHelper/FlatArray.InnerArrayHelper.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerArrayHelper/FlatArray.InnerArrayHelper.cs
index 8262094e..acceed9e 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerArrayHelper/FlatArray.InnerArrayHelper.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerArrayHelper/FlatArray.InnerArrayHelper.cs
@@ -12,7 +12,6 @@ internal static T[] Copy(T[] array)
             =>
             new ReadOnlySpan<T>(array).ToArray();
 
-        // The caller MUST ensure the length is within the array length
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static T[] Copy(T[] array, int length)
         {
@@ -24,11 +23,10 @@ internal static T[] Copy(T[] array, int length)
             return sourceSpan.ToArray();
         }
 
-        // The caller MUST ensure the segment is within the array
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static T[] CopySegment(T[] array, int start, int length)
         {
-            Debug.Assert(InnerAllocHelper.IsSegmentWithin(start, length, array.Length));
+            Debug.Assert(InnerAllocHelper.IsSegmentWithinLength(start, length, array.Length));
 
             var sourceSpan = start == default && length == array.Length
                 ? new ReadOnlySpan<T>(array)
@@ -36,7 +34,6 @@ internal static T[] CopySegment(T[] array, int start, int length)
             return sourceSpan.ToArray();
         }
 
-        // The caller MUST ensure the lengths are within the arrays actual lengths
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static T[] Concat(T[] array1, int length1, T[] array2, int length2)
         {
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromArray.cs
index 633583a3..bc450f5a 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromArray.cs
@@ -15,7 +15,7 @@ internal static FlatArray<T> FromArray(T[] source)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static FlatArray<T> FromArray(T[] source, int start, int length)
         {
-            Debug.Assert(InnerAllocHelper.IsSegmentWithin(start, length, source.Length));
+            Debug.Assert(InnerAllocHelper.IsSegmentWithinLength(start, length, source.Length));
 
             return length == default ? default : new(InnerArrayHelper.CopySegment(source, start, length), default);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromFlatArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromFlatArray.cs
index d5ae367b..b0bbf75e 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromFlatArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromFlatArray.cs
@@ -15,7 +15,7 @@ internal static FlatArray<T> FromFlatArray(FlatArray<T> source)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static FlatArray<T> FromFlatArray(FlatArray<T> source, int start, int length)
         {
-            Debug.Assert(InnerAllocHelper.IsSegmentWithin(start, length, source.length));
+            Debug.Assert(InnerAllocHelper.IsSegmentWithinLength(start, length, source.length));
 
             return length == default ? default : new(InnerArrayHelper.CopySegment(source.items!, start, length), default);
         }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromImmutableArray.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromImmutableArray.cs
index 857cddaf..955f11c1 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromImmutableArray.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromImmutableArray.cs
@@ -25,9 +25,9 @@ internal static FlatArray<T> FromImmutableArray(ImmutableArray<T> source)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static FlatArray<T> FromImmutableArray(ImmutableArray<T> source, int start, int length)
         {
-            Debug.Assert(InnerAllocHelper.IsSegmentWithin(start, length, source.IsDefault ? default : source.Length));
+            Debug.Assert(InnerAllocHelper.IsSegmentWithinLength(start, length, source.IsDefault ? default : source.Length));
 
-            if (source.IsDefaultOrEmpty)
+            if (length == default)
             {
                 return default;
             }
diff --git a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromList.cs b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromList.cs
index 2c7be8c5..de809d1c 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromList.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T/InnerFactory/FlatArray.InnerFactory.FromList.cs
@@ -26,7 +26,7 @@ internal static FlatArray<T> FromList(List<T> source)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal static FlatArray<T> FromList(List<T> source, int start, int length)
         {
-            Debug.Assert(InnerAllocHelper.IsSegmentWithin(start, length, source.Count));
+            Debug.Assert(InnerAllocHelper.IsSegmentWithinLength(start, length, source.Count));
 
             if (length == default)
             {
diff --git a/src/flatcollections-array/FlatArray/FlatArray.csproj b/src/flatcollections-array/FlatArray/FlatArray.csproj
index f64598cb..2d413fd8 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.csproj
+++ b/src/flatcollections-array/FlatArray/FlatArray.csproj
@@ -17,7 +17,7 @@
     <Description>PrimeFuncPack Core.FlatArray is a core library for .NET consisting of immutable FlatArray targeted for use in functional programming.</Description>
     <RootNamespace>System</RootNamespace>
     <AssemblyName>PrimeFuncPack.Core.FlatArray</AssemblyName>
-    <Version>1.2.0-rc.1</Version>
+    <Version>1.2.0-rc.2</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/flatcollections/FlatCollections/FlatCollections.csproj b/src/flatcollections/FlatCollections/FlatCollections.csproj
index fca6db0d..18208b03 100644
--- a/src/flatcollections/FlatCollections/FlatCollections.csproj
+++ b/src/flatcollections/FlatCollections/FlatCollections.csproj
@@ -17,7 +17,7 @@
     <Description>PrimeFuncPack Core.FlatCollections is a set of immutable Flat collections for .NET designed for developing business applications based on functional programming.</Description>
     <RootNamespace>System</RootNamespace>
     <AssemblyName>PrimeFuncPack.Core.FlatCollections</AssemblyName>
-    <Version>1.2.0-rc.1</Version>
+    <Version>1.2.0-rc.2</Version>
   </PropertyGroup>
 
   <ItemGroup>
@@ -32,7 +32,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="PrimeFuncPack.Core.FlatArray" Version="1.2.0-rc.1" />
+    <PackageReference Include="PrimeFuncPack.Core.FlatArray" Version="1.2.0-rc.2" />
   </ItemGroup>
 
 </Project>