added static acess variables for all UnitSystems

in order to avoid breaking the namespace (UnitSystem.SI) all static instances were added to the UnitSystem.Definition (partial class)

Author: lipchev

UnitsNet/UnitSystem.Definitions.cs

@@ -0,0 +1,52 @@
+// Licensed under MIT No Attribution, see LICENSE file at the root.
+// Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
+
+using UnitsNet.UnitSystems;
+
+namespace UnitsNet
+{
+    public partial class UnitSystem
+    {
+        /// <summary>
+        ///     Gets the SI unit system.
+        /// </summary>
+        public static SI SI { get; } = new SI();
+
+
+        /// <summary>
+        ///     Gets the British Imperial unit system.
+        /// </summary>
+        public static BI BI { get; } = new BI();
+
+
+        /// <summary>
+        ///     Gets the English Engineering unit system.
+        /// </summary>
+        public static EE EE { get; } = new EE();
+
+
+        /// <summary>
+        ///     Gets the United States Customary unit system.
+        /// </summary>
+        public static USC USC { get; } = new USC();
+
+
+        /// <summary>
+        ///     Gets the Centimeter–Gram–Second unit system.
+        /// </summary>
+        public static CGS CGS { get; } = new CGS();
+
+
+        /// <summary>
+        ///     Gets the Foot–Pound–Second unit system.
+        /// </summary>
+        public static FPS FPS { get; } = new FPS();
+
+
+        /// <summary>
+        ///     Gets the unit system of typical astronomical units
+        /// </summary>
+        public static Astronomical Astronomical { get; } = new Astronomical();
+
+    }
+}

UnitsNet/UnitSystem.cs

@@ -13,7 +13,7 @@ namespace UnitsNet
     ///     selected base units,
     ///     such as <see cref="SI" /> to use SI base units such as meters, kilograms and seconds.
     /// </summary>
-    public class UnitSystem : IEquatable<UnitSystem>
+    public partial class UnitSystem : IEquatable<UnitSystem>
     {
         // the array used for storing the default units in the current UnitSystem, ordered by QuantityType (excluding QuantityType.Undefined)
         private readonly Lazy<UnitSystemInfo[]> _systemUnits;
@@ -70,11 +70,6 @@ protected UnitSystem(Lazy<UnitSystemInfo[]> systemUnits)
             _systemUnits = systemUnits;
         }
 
-        /// <summary>
-        ///     Gets the SI unit system.
-        /// </summary>
-        public static SI SI { get; } = new SI();
-
         /// <summary>
         ///     Gets the default unit information for the given quantity type, associated with the current unit system.
         ///     For example: the default unit of length in SI is the 'meter' abbreviated with the letter 'm'.