diff --git a/BeefLibs/corlib/src/Collections/List.bf b/BeefLibs/corlib/src/Collections/List.bf
index 22fb79d2..4ce06606 100644
--- a/BeefLibs/corlib/src/Collections/List.bf
+++ b/BeefLibs/corlib/src/Collections/List.bf
@@ -530,6 +530,22 @@ namespace System.Collections
 				span[i] = mItems[i];
 		}
 
+		public void CopyTo(Span<T> array, int arrayIndex)
+		{
+			// Delegate rest of error checking to Array.Copy.
+			for (int i = 0; i < mSize; i++)
+				array[i + arrayIndex] = mItems[i];
+		}
+
+		public void CopyTo(int index, Span<T> array, int arrayIndex, int count)
+		{
+			Debug.Assert((uint)index < (uint)mSize);
+			Debug.Assert((uint)index + (uint)count <= (uint)mSize);
+			// Delegate rest of error checking to Array.Copy.
+			for (int i = 0; i < count; i++)
+				array[i + arrayIndex] = mItems[i + index];
+		}
+
 		public void CopyTo(T[] array, int arrayIndex)
 		{
 			// Delegate rest of error checking to Array.Copy.
diff --git a/BeefLibs/corlib/src/Span.bf b/BeefLibs/corlib/src/Span.bf
index 02f88634..c30753df 100644
--- a/BeefLibs/corlib/src/Span.bf
+++ b/BeefLibs/corlib/src/Span.bf
@@ -294,6 +294,14 @@ namespace System
 			Internal.MemMove(destination.mPtr, mPtr, Internal.GetArraySize<T>(mLength), (int32)alignof(T));
 		}
 
+		public void CopyTo(int index, Span<T> array, int arrayIndex, int count)
+		{
+			Debug.Assert((uint)index < (uint)Length);
+			Debug.Assert((uint)index + (uint)count <= (uint)Length);
+			for (int i = 0; i < count; i++)
+				array[i + arrayIndex] = Ptr[i + index];
+		}
+
 		public Span<uint8> ToRawData()
 		{
 			return Span<uint8>((uint8*)mPtr, mLength * sizeof(T));