From bade4b4e2180ef69a8731aefe06fdcfc4b63f8a4 Mon Sep 17 00:00:00 2001
From: Steve Wagner <lanwin@lanwin.de>
Date: Sat, 22 May 2010 17:43:09 +0200
Subject: [PATCH] Add copy constructor for Oid.

---
 source/MongoDB.Tests/UnitTests/TestOid.cs | 13 +++++++++++--
 source/MongoDB/Oid.cs                     | 12 ++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/source/MongoDB.Tests/UnitTests/TestOid.cs b/source/MongoDB.Tests/UnitTests/TestOid.cs
index c3a1577c..6df593f7 100644
--- a/source/MongoDB.Tests/UnitTests/TestOid.cs
+++ b/source/MongoDB.Tests/UnitTests/TestOid.cs
@@ -88,7 +88,7 @@ public void TestFormatJ()
         }
 
         [Test]
-        public void TestIDCharacters()
+        public void TestIdCharacters()
         {
             var thrown = false;
             try
@@ -103,7 +103,7 @@ public void TestIDCharacters()
         }
 
         [Test]
-        public void TestIDLength()
+        public void TestIdLength()
         {
             var thrown = false;
             try
@@ -247,5 +247,14 @@ public void TestToByteArray()
             Assert.AreEqual(12, bytes2.Length);
             Assert.AreEqual(bytes, bytes2);
         }
+
+        [Test]
+        public void TestCopyConstructor()
+        {
+            var source = Oid.NewOid();
+            var dest = new Oid(source);
+
+            Assert.AreEqual(source,dest);
+        }
     }
 }
\ No newline at end of file
diff --git a/source/MongoDB/Oid.cs b/source/MongoDB/Oid.cs
index 6a6fd9ab..26e6ddb8 100644
--- a/source/MongoDB/Oid.cs
+++ b/source/MongoDB/Oid.cs
@@ -51,6 +51,18 @@ public Oid(byte[] value)
             Array.Copy(value, _bytes, 12);
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Oid"/> class.
+        /// </summary>
+        /// <param name="oid">The oid.</param>
+        public Oid(Oid oid)
+        {
+            if(oid == null)
+                throw new ArgumentNullException("oid");
+
+            _bytes = oid._bytes;
+        }
+
         /// <summary>
         ///   Gets the created.
         /// </summary>