System.Net.Mime.Tests.ContentDispositionTest.Filename_Roundtrip C# (CSharp) Method

        public static void Filename_Roundtrip()
        {
            var cd = new ContentDisposition();

            Assert.Null(cd.FileName);
            Assert.Empty(cd.Parameters);

            cd.FileName = "hello";
            Assert.Equal("hello", cd.FileName);
            Assert.Equal(1, cd.Parameters.Count);
            Assert.Equal("hello", cd.Parameters["filename"]);
            Assert.Equal("attachment; filename=hello", cd.ToString());

            cd.FileName = "world";
            Assert.Equal("world", cd.FileName);
            Assert.Equal(1, cd.Parameters.Count);
            Assert.Equal("world", cd.Parameters["filename"]);
            Assert.Equal("attachment; filename=world", cd.ToString());

            cd.FileName = null;
            Assert.Null(cd.FileName);
            Assert.Empty(cd.Parameters);

            cd.FileName = string.Empty;
            Assert.Null(cd.FileName);
            Assert.Empty(cd.Parameters);
        }