1 files changed, 100 insertions, 0 deletions

diff --git a/src/dtf/WixToolset.Dtf.WindowsInstaller/Installation.cs b/src/dtf/WixToolset.Dtf.WindowsInstaller/Installation.cs
new file mode 100644
index 00000000..47ca00a1
--- /dev/null
+++ b/src/dtf/WixToolset.Dtf.WindowsInstaller/Installation.cs
@@ -0,0 +1,100 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dtf.WindowsInstaller
+{
+    using System;
+    using System.Text;
+    using System.Globalization;
+
+    /// <summary>
+    /// Subclasses of this abstract class represent a unique instance of a
+    /// registered product or patch installation.
+    /// </summary>
+    public abstract class Installation
+    {
+        private string installationCode;
+        private string userSid;
+        private UserContexts context;
+        private SourceList sourceList;
+
+        internal Installation(string installationCode, string userSid, UserContexts context)
+        {
+            if (context == UserContexts.Machine)
+            {
+                userSid = null;
+            }
+            this.installationCode = installationCode;
+            this.userSid = userSid;
+            this.context = context;
+        }
+
+        /// <summary>
+        /// Gets the user security identifier (SID) under which this product or patch
+        /// installation is available.
+        /// </summary>
+        public string UserSid
+        {
+            get
+            {
+                return this.userSid;
+            }
+        }
+
+        /// <summary>
+        /// Gets the user context of this product or patch installation.
+        /// </summary>
+        public UserContexts Context
+        {
+            get
+            {
+                return this.context;
+            }
+        }
+
+        /// <summary>
+        /// Gets the source list of this product or patch installation.
+        /// </summary>
+        public virtual SourceList SourceList
+        {
+            get
+            {
+                if (this.sourceList == null)
+                {
+                    this.sourceList = new SourceList(this);
+                }
+                return this.sourceList;
+            }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether this product or patch is installed on the current system.
+        /// </summary>
+        public abstract bool IsInstalled
+        {
+            get;
+        }
+
+        internal string InstallationCode
+        {
+            get
+            {
+                return this.installationCode;
+            }
+        }
+
+        internal abstract int InstallationType
+        {
+            get;
+        }
+
+        /// <summary>
+        /// Gets a property about the product or patch installation.
+        /// </summary>
+        /// <param name="propertyName">Name of the property being retrieved.</param>
+        /// <returns></returns>
+        public abstract string this[string propertyName]
+        {
+            get;
+        }
+    }
+}