before deleting Rules

CouchDB/Selectors/Equals.cs

@@ -0,0 +1,18 @@
+namespace CouchDB.Selectors
+{
+  public class Equals
+  {
+    private readonly string key;
+    private readonly string value;
+    internal Equals(string key, string value)
+    {
+      this.key = key;
+      this.value = value;
+    }
+
+    public override string ToString()
+    {
+      return $"{{ \"{key}\": {{ \"$eq\": {value}}} }}";
+    }
+  }
+}