before deleting Rules

CouchDB/CouchDB.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Results\" />
+  </ItemGroup>
+
+</Project>

CouchDB/CouchDocument.cs

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+namespace CouchDB
+{
+  public class CouchDocument<T>
+  {
+    public readonly string _id;
+    public readonly string type;
+    public readonly T model;
+
+    public CouchDocument(string id, T model)
+    {
+      _id = id;
+      this.model = model;
+      type = nameof(T);
+    }
+  }
+}

CouchDB/Selectors/CouchQuery.cs

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+using System.Collections.Generic;
+
+namespace CouchDB.Selectors
+{
+  public class CouchQuery
+  {
+    public static CouchQuery Select => new();
+
+    private readonly List<Equals> equals;
+    protected CouchQuery()
+    {
+      equals = new List<Equals>();
+    }
+
+    public CouchQuery WithEqual(string key, string value)
+    {
+      equals.Add(new Equals(key, value));
+      return this;
+    }
+
+    public override string ToString()
+    {
+      var selector = string.Join(",", equals);
+      return $"{{ \"selector\": {selector}";
+    }
+  }
+}

CouchDB/Selectors/Equals.cs

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+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}}} }}";
+    }
+  }
+}