System.Tests.StringTests.Concat_Invalid C# (CSharp) Method

        public static void Concat_Invalid()
        {
            Assert.Throws<ArgumentNullException>("values", () => string.Concat((IEnumerable<string>)null)); // Values is null
            Assert.Throws<ArgumentNullException>("values", () => string.Concat<string>((IEnumerable<string>)null)); // Generic overload
            Assert.Throws<ArgumentNullException>("values", () => string.Concat(null)); // Values is null

            Assert.Throws<ArgumentNullException>("args", () => string.Concat((object[])null)); // Values is null
            Assert.Throws<ArgumentNullException>("values", () => string.Concat<string>(null)); // Values is null
            Assert.Throws<ArgumentNullException>("values", () => string.Concat<object>(null)); // Values is null
        }