System.Text.Tests.StringBuilderTests.Append_Char C# (CSharp) Method

        public static void Append_Char(string original, char value, int repeatCount, string expected)
        {
            StringBuilder builder;
            if (repeatCount == 1)
            {
                // Use Append(char)
                builder = new StringBuilder(original);
                builder.Append(value);
                Assert.Equal(expected, builder.ToString());
            }
            // Use Append(char, int)
            builder = new StringBuilder(original);
            builder.Append(value, repeatCount);
            Assert.Equal(expected, builder.ToString());
        }