true
public void TestContentMd5 () { var part = new MimePart (); Assert.IsNull (part.ContentMd5, "Initial ContentMd5 value should be null"); part.ContentMd5 = "XYZ"; Assert.AreEqual ("XYZ", part.ContentMd5, "Expected ContentMd5 to be updated"); Assert.IsTrue (part.Headers.Contains (HeaderId.ContentMd5), "Expected header to exist"); part.ContentMd5 = null; Assert.IsNull (part.ContentMd5, "Expected ContentMd5 to be null again"); Assert.IsFalse (part.Headers.Contains (HeaderId.ContentMd5), "Expected header to be removed"); part.Headers.Add (HeaderId.ContentMd5, "XYZ"); Assert.AreEqual ("XYZ", part.ContentMd5, "Expected ContentMd5 to be set again"); part.Headers.Remove (HeaderId.ContentMd5); Assert.IsNull (part.ContentMd5, "Expected ContentMd5 to be null again"); part.ContentMd5 = "XYZ"; part.Headers.Clear (); Assert.IsNull (part.ContentMd5, "Expected ContentMd5 to be null again"); Assert.Throws<InvalidOperationException> (() => part.ComputeContentMd5 ()); Assert.IsFalse (part.VerifyContentMd5 ()); }