some changes

DTLib.csproj

@@ -35,6 +35,8 @@
     <Compile Include="Color.cs" />
     <Compile Include="CompressedArray.cs" />
     <Compile Include="DefaultLogger.cs" />
+    <Compile Include="Filesystem\Symlink.cs" />
+    <Compile Include="MyDict.cs" />
     <Compile Include="Dtsod\DtsodV21.cs" />
     <Compile Include="Dtsod\DtsodV22.cs" />
     <Compile Include="Dtsod\V30\DtsodSerializableAttribute.cs" />

DefaultLogger.cs

@@ -5,19 +5,25 @@ using DTLib.Filesystem;
 namespace DTLib
 {
     // вывод лога в консоль и файл
-    public static class DefaultLogger
+    public class DefaultLogger
     {
-        public static void SetLogfile(string dir, string programName)
+        public DefaultLogger() { }
+        public DefaultLogger(string logfile) => Logfile = logfile;
+        public DefaultLogger(string dir, string programName) => SetLogfile(dir, programName);
+
+        public void SetLogfile(string dir, string programName)
             => Logfile = $"{dir}\\{programName}_{DateTime.Now}.log".Replace(':', '-').Replace(' ', '_');
 
-        public static string Logfile { get; set; }
+        public string Logfile { get; set; }
-        public static void Log(params string[] msg)
+
+        public void Log(params string[] msg)
         {
             if (msg.Length == 1) msg[0] = "[" + DateTime.Now.ToString() + "]: " + msg[0];
             else msg[1] = "[" + DateTime.Now.ToString() + "]: " + msg[1];
             LogNoTime(msg);
         }
-        public static void LogNoTime(params string[] msg)
+
+        public void LogNoTime(params string[] msg)
         {
             lock (Logfile)
             {

FrameworkFix.cs

@@ -215,20 +215,6 @@ namespace DTLib
             if (condition) if_true(input);
         }
 
-        public static T IfIsNull<T>(this T input, Func<T> if_true, Func<T> if_false) =>
-            input is null ? if_true() : if_false();
-        public static void IfIsNull<T>(this T input, Action if_true, Action if_false)
-        {
-            if (input is null) if_true();
-            else if_false();
-        }
-        public static T IfNull<T>(this T input, Func<T> if_true) =>
-            input is null ? if_true() : input;
-        public static void IfIsNull<T>(this T input, Action if_true)
-        {
-            if (input is null) if_true();
-        }
-
         public static string AddZeroes<T>(this T number, int length)
         {
             var str = number.ToString();

MyDict.cs

@@ -0,0 +1,127 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DTLib
+{
+    public class MyDict<TKey, TVal>
+    {
+        object locker = new object();
+        List<TVal> values;
+        List<TKey> keys;
+        List<int> hashes;
+        int count;
+
+        public int Count
+        {
+            get
+            {
+                // lock (count)
+                lock (locker) return count;
+            }
+        }
+
+        public ReadOnlyCollection<TVal> Values
+        {
+            get
+            {
+                ReadOnlyCollectionBuilder<TVal> b;
+                lock (locker) b = new(values);
+                return b.ToReadOnlyCollection();
+            }
+        }
+
+        public ReadOnlyCollection<TKey> Keys
+        {
+            get
+            {
+                ReadOnlyCollectionBuilder<TKey> b;
+                lock (locker) b = new(keys);
+                return b.ToReadOnlyCollection();
+            }
+        }
+
+        public MyDict()
+        {
+
+            values = new();
+            keys = new();
+            hashes = new();
+            count = 0;
+        }
+
+        public MyDict(IList<TKey> _keys, IList<TVal> _values)
+        {
+            if (_keys.Count != _values.Count) throw new Exception("_keys.Count != _values.Count");
+            keys = (List<TKey>)_keys;
+            values = (List<TVal>)_values;
+            count = _keys.Count;
+            hashes = new();
+            for (int i = 0; i < count; i++)
+                hashes.Add(keys[i].GetHashCode());
+        }
+
+        public TVal this[TKey key]
+        {
+            get
+            {
+                lock (locker) return values[hashes.IndexOf(key.GetHashCode())];
+            }
+            set
+            {
+                lock (locker) values[hashes.IndexOf(key.GetHashCode())] = value;
+            }
+        }
+
+        public (TKey, TVal) GetByIndex(int index)
+        {
+            (TKey k, TVal v) output;
+            lock (locker)
+            {
+                output.k = keys[index];
+                output.v = values[index];
+            }
+            return output;
+        }
+
+        public void Add(TKey key, TVal val)
+        {
+            // lock (keys) lock (values) lock (count)
+            lock (locker)
+            {
+                keys.Add(key);
+                values.Add(val);
+                hashes.Add(key.GetHashCode());
+                count++;
+            }
+        }
+
+        public void Remove(TKey key)
+        {
+            var hash = key.GetHashCode();
+            lock (locker)
+            {
+                var num = hashes.IndexOf(hash);
+                keys.RemoveAt(num);
+                values.RemoveAt(num);
+                hashes.RemoveAt(num);
+                count--;
+            }
+        }
+
+        public void Clear()
+        {
+            lock (locker)
+            {
+                hashes.Clear();
+                keys.Clear();
+                values.Clear();
+                count = 0;
+            }
+        }
+    }
+}