create a setup builder impl from MicaSetup

Build/MicaSetup/Design/Converters/StringIsNotNullOrEmptyConverter.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace MicaSetup.Design.Converters;
+
+[ValueConversion(typeof(string), typeof(bool))]
+public class StringIsNotNullOrEmptyConverter : StringIsNullOrEmptyConverter
+{
+    public StringIsNotNullOrEmptyConverter()
+    {
+        this.IsInverted = true;
+    }
+}
+
+[ValueConversion(typeof(string), typeof(bool))]
+public class StringIsNullOrEmptyConverter : SingletonConverterBase<StringIsNotNullOrEmptyConverter>
+{
+    public static readonly DependencyProperty IsInvertedProperty = DependencyProperty.Register(
+        nameof(IsInverted),
+        typeof(bool),
+        typeof(StringIsNullOrEmptyConverter),
+        new PropertyMetadata(false));
+
+    public bool IsInverted
+    {
+        get { return (bool)this.GetValue(IsInvertedProperty); }
+        set { this.SetValue(IsInvertedProperty, value); }
+    }
+
+    protected override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (targetType is null)
+        {
+            throw new ArgumentNullException(nameof(targetType));
+        }
+
+        if (this.IsInverted)
+        {
+            return !string.IsNullOrEmpty(value as string);
+        }
+
+        return string.IsNullOrEmpty(value as string);
+    }
+}