diff --git a/src/Core/Core.csproj b/src/Core/Core.csproj
index 81f3412..335e54f 100644
--- a/src/Core/Core.csproj
+++ b/src/Core/Core.csproj
@@ -18,7 +18,7 @@
     <GeneratePackageOnBuild>$(_IsPublishing)</GeneratePackageOnBuild>
     <Title>Some OK core utility functions</Title>
     <RepositoryUrl>https://github.com/scottbilas/OkTools</RepositoryUrl>
-    <PackageVersion>1.0.6</PackageVersion>
+    <PackageVersion>1.0.7</PackageVersion>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <PackageLicenseFile>LICENSE.md</PackageLicenseFile>
   </PropertyGroup>
diff --git a/src/Core/EnumerableExtensions.cs b/src/Core/EnumerableExtensions.cs
index 289951e..9736c04 100644
--- a/src/Core/EnumerableExtensions.cs
+++ b/src/Core/EnumerableExtensions.cs
@@ -16,6 +16,11 @@ public static IEnumerable<T> OrEmpty<T>(this IEnumerable<T>? @this) =>
     public static IReadOnlyList<T> OrEmpty<T>(this IReadOnlyList<T>? @this) =>
         @this ?? Array.Empty<T>();
 
+    public static bool Any<T>(this ICollection<T> @this) =>
+        @this.Count != 0;
+    public static bool IsEmpty<T>(this ICollection<T> @this) =>
+        @this.Count == 0;
+
     // singles
 
     public static T SingleOr<T>(this IEnumerable<T> @this, T defaultValue)
diff --git a/src/Core/Sys.cs b/src/Core/Sys.cs
new file mode 100644
index 0000000..3f34296
--- /dev/null
+++ b/src/Core/Sys.cs
@@ -0,0 +1,25 @@
+using System.Runtime.InteropServices;
+
+namespace OkTools.Core;
+
+// only care about these right now
+public enum SysPlatform : byte { Windows, Mac, Linux, }
+public enum SysArchitecture : byte { X64, Arm64 }
+
+public static class Sys
+{
+    public static readonly SysPlatform Platform
+        = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? SysPlatform.Windows
+        : RuntimeInformation.IsOSPlatform(OSPlatform.OSX)     ? SysPlatform.Mac
+        : RuntimeInformation.IsOSPlatform(OSPlatform.Linux)   ? SysPlatform.Linux
+        : throw new NotSupportedException("Unsupported/invalid platform");
+
+    // ReSharper disable once SwitchExpressionHandlesSomeKnownEnumValuesWithExceptionInDefault
+    public static readonly SysArchitecture Architecture
+        = RuntimeInformation.OSArchitecture switch
+        {
+            System.Runtime.InteropServices.Architecture.X64   => SysArchitecture.X64,
+            System.Runtime.InteropServices.Architecture.Arm64 => SysArchitecture.Arm64,
+            _ => throw new NotSupportedException("Unsupported/invalid architecture")
+        };
+}