Apache.Shiro.Util.StringUtils.SplitKeyValue C# (CSharp) Method

        public static string[] SplitKeyValue(string keyValue)
        {
            var line = Clean(keyValue);
            if (line == null)
            {
                return null;
            }

            string[] split = line.Split(" ".ToCharArray(), 2);
            if (split.Length != 2)
            {
                split = line.Split("=".ToCharArray(), 2);
                if (split.Length != 2)
                {
                    throw new ArgumentException("Unable to determine Key/Value pair from line [" + line + "]. There is no space from " +
                        "which the split location could be determined");
                }
            }

            var key = Clean(split[0]);
            if (key == null)
            {
                throw new ArgumentException("No valid key could be found in line [" + line + "] to form a key/value pair");
            }

            var value = Clean(split[1]);
            if (value == null)
            {
                throw new ArgumentException("No corresponding value could be found in line [" + line + "] for key [" + key + "]");
            }
            if (value.StartsWith("="))
            {
                value = Clean(value.Substring(1));
                if (value == null)
                {
                    throw new ArgumentException("No corresponding value could be found in line [" + line + "] for key [" + key + "]");
                }
            }

            return new string[] {key, value};
        }