C# class for method parameter checks

Ensure.cs

public static class Ensure
{
    public static void ArgumentNotNull<T>(T argument, string argumentName) where T : class
    {
        if (argument == null)
            throw new ArgumentNullException(argumentName);
    }

    public static void ArgumentNotNull<T>(Nullable<T> argument, string argumentName) where T : struct
    {
        if (argument == null)
            throw new ArgumentNullException(argumentName);
    }

    public static void StringArgumentNotNullAndNotEmpty(string argument, string argumentName)
    {
        if (argument == null)
            throw new ArgumentNullException(argumentName);

        if (argument.Length == 0)
            throw new ArgumentException("argument cannot be empty", argumentName);
    }

    public static void ArrayArgumentNotNullAndNotEmpty<T>(T[] argument, string argumentName)
    {
        if (argument == null)
            throw new ArgumentNullException(argumentName);

        if (argument.Length == 0)
            throw new ArgumentException("argument cannot be empty", argumentName);
    }
}