System.Text.Tests.StringBuilderTests.Item_Get_Set C# (CSharp) Метод

        public static void Item_Get_Set()
        {
            string s = "Hello";
            var builder = new StringBuilder(s);

            for (int i = 0; i < s.Length; i++)
            {
                Assert.Equal(s[i], builder[i]);

                char c = (char)(i + '0');
                builder[i] = c;
                Assert.Equal(c, builder[i]);
            }
            Assert.Equal("01234", builder.ToString());
        }