Updated initial setup

PluginManager/WindowManagement/Controls/TextBox.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace PluginManager.WindowManagement.Controls
+{
+    public class TextBox
+    {
+        public Label Label { get; set; }
+        public string Text { get; private set; }
+        public Func<string, bool> IsValid { get; set; }
+
+        public bool SetText(string text)
+        {
+            if(IsValid(text))
+            {
+                Text = text;
+                return true;
+            }
+
+            return false;
+
+        }
+    }
+}