public static bool IsJson(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
input = input.Trim();
return (input.StartsWith("{", StringComparison.OrdinalIgnoreCase) && input.EndsWith("}", StringComparison.OrdinalIgnoreCase))
|| (input.StartsWith("[", StringComparison.OrdinalIgnoreCase) && input.EndsWith("]", StringComparison.OrdinalIgnoreCase));
}