more constructors for UniquieID

Pilz.Cryptography/UniquieID.cs

@@ -16,10 +16,10 @@ namespace Pilz.Cryptography
         protected string _iD;
 
         [JsonIgnore]
-        public virtual bool SimpleMode { get; set; } = false;
+        public virtual bool SimpleMode { get; }
 
         [JsonIgnore]
-        public virtual bool GenerateOnGet { get; set; } = false;
+        public virtual bool GenerateOnGet { get; }
 
         [JsonIgnore]
         public virtual bool HasID => !string.IsNullOrEmpty(_iD);
@@ -37,14 +37,27 @@ namespace Pilz.Cryptography
                 => _iD = value;
         }
 
-        public UniquieID() : this(false)
+        public UniquieID() : this(UniquieIDGenerationMode.None)
         {
         }
 
-        public UniquieID(bool autoGenerate)
+        public UniquieID(UniquieIDGenerationMode mode) : this(mode, false)
         {
-            if (autoGenerate)
+        }
+
+        public UniquieID(UniquieIDGenerationMode mode, bool simpleMode)
+        {
+            SimpleMode = simpleMode;
+
+            if (mode == UniquieIDGenerationMode.GenerateOnInit)
                 GenerateIfNull();
+            else if (mode == UniquieIDGenerationMode.GenerateOnGet)
+                GenerateOnGet = true;
+        }
+
+        [Obsolete]
+        public UniquieID(bool autoGenerate) : this(autoGenerate ? UniquieIDGenerationMode.GenerateOnInit : UniquieIDGenerationMode.None)
+        {
         }
 
         public virtual void Generate()

Pilz.Cryptography/UniquieIDGenerationMode.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Pilz.Cryptography
+{
+    public enum UniquieIDGenerationMode
+    {
+        None,
+        GenerateOnGet,
+        GenerateOnInit
+    }
+}