public void DelegatingStream_Write()
        {
            // Arrange
            Mock<Stream> mockInnerStream = new Mock<Stream>();
            MockDelegatingStream mockStream = new MockDelegatingStream(mockInnerStream.Object);
            byte[] buffer = new byte[2];
            int offset = 1;
            int count = 1;

            // Act
            mockStream.Write(buffer, offset, count);

            // Assert 
            mockInnerStream.Verify(s => s.Write(buffer, offset, count), Times.Once());
        }