Added class for identified strings

Discord Media Loader.Application/DML.Application.csproj

@@ -179,6 +179,7 @@
     <Compile Include="FrmInternalSplash.Designer.cs">
       <DependentUpon>FrmInternalSplash.cs</DependentUpon>
     </Compile>
+    <Compile Include="Helper\IdentifiedString.cs" />
     <Compile Include="MainForm.cs">
       <SubType>Form</SubType>
     </Compile>

Discord Media Loader.Application/Helper/IdentifiedString.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DML.Application.Helper
+{
+    internal class IdentifiedString<T>
+    {
+        internal T Id { get; set; }
+        internal string Caption { get; set; }
+        
+        internal IdentifiedString(T id, string caption)
+        {
+            Id = id;
+            Caption = caption;
+        }
+
+        public override string ToString() => Caption;
+    }
+}