System.Data.SqlTypes.SqlChars.SetNull C# (CSharp) Method

        public void SetNull()
        {
            _lCurLen = x_lNull;
            _stream = null;
            _state = SqlBytesCharsState.Null;

            AssertValid();
        }

		public void SqlCharsSetNull ()
		{
			char [] b1 = new char [10];
			SqlChars chars = new SqlChars (b1);
			Assert.AreEqual (chars.Length, 10, "#1 Should be same");
			chars.SetNull ();
			try {
				Assert.AreEqual (chars.Length, 10, "#1 Should not be same");
				Assert.Fail ("Should throw SqlNullValueException");
			} catch (Exception ex) {
				Assert.AreEqual (typeof (SqlNullValueException), ex.GetType (), "Should throw SqlNullValueException");
			}
			Assert.AreEqual (true, chars.IsNull, "#2 Should be same");
		}