first commit

MyNewProjectName.Domain/ValueObjects/ValueObject.cs

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+namespace MyNewProjectName.Domain.ValueObjects;
+
+/// <summary>
+/// Base class for value objects
+/// </summary>
+public abstract class ValueObject
+{
+    protected abstract IEnumerable<object?> GetEqualityComponents();
+
+    public override bool Equals(object? obj)
+    {
+        if (obj == null || obj.GetType() != GetType())
+        {
+            return false;
+        }
+
+        var other = (ValueObject)obj;
+        return GetEqualityComponents().SequenceEqual(other.GetEqualityComponents());
+    }
+
+    public override int GetHashCode()
+    {
+        return GetEqualityComponents()
+            .Select(x => x?.GetHashCode() ?? 0)
+            .Aggregate((x, y) => x ^ y);
+    }
+
+    public static bool operator ==(ValueObject? left, ValueObject? right)
+    {
+        if (left is null && right is null)
+            return true;
+
+        if (left is null || right is null)
+            return false;
+
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(ValueObject? left, ValueObject? right)
+    {
+        return !(left == right);
+    }
+}