Extension methods for getting name of property as a string

GetPropertyName

public static string GetPropertyName<T>(this T type, Expression<Func<T, object>> expression)
{
    return GetPropertyName<T>(expression);
}

public static string GetPropertyName<T>(Expression<Func<T, object>> expression)
{
    var lambda = expression as LambdaExpression;

    MemberExpression memberExpression = lambda.Body is UnaryExpression
                                            ? (lambda.Body as UnaryExpression).Operand as MemberExpression
                                            : lambda.Body as MemberExpression;

    return memberExpression == null ? null : (memberExpression.Member as PropertyInfo).Name;
}