Add ForceCombinationPropertyUserControl

StructureHelperCommon/Models/Forces/IForceFactoredCombination.cs

@@ -0,0 +1,15 @@
+using StructureHelperCommon.Infrastructures.Enums;
+
+namespace StructureHelperCommon.Models.Forces
+{
+    /// <summary>
+    /// Supports common properties of factored combination of forces
+    /// </summary>
+    public interface IForceFactoredCombination : IForceAction
+    {
+        /// <summary>
+        /// Properties of factored combination of forces
+        /// </summary>
+        IFactoredCombinationProperty CombinationProperty { get; }
+    }
+}