/// <summary>
/// Returns the member name of the specific type.
/// </summary>
/// <typeparam name="TResult">Type of the member of the type whose member name will be obtained.</typeparam>
/// <param name="expression">Lambda expression of member access. "MemberAccess" for properties, "Call" for methods.</param>
/// <returns></returns>
public static string GetMemberName<TResult>(Expression<Func<T, TResult>> expression, ExpressionType expressionType)
{
	switch (expressionType)
	{
		case ExpressionType.MemberAccess:
			var memberExpression = (MemberExpression)expression.Body;
			if (memberExpression == null)
			{
				throw new InvalidOperationException("Expression must be of member access.");
			}
			return memberExpression.Member.Name;

		case ExpressionType.Call:
			var methodCallExpression = (MethodCallExpression)expression.Body;
			if (methodCallExpression == null)
			{
				throw new InvalidOperationException("Expression must be of method access.");
			}
			return methodCallExpression.Method.Name;

		default:
			throw new InvalidOperationException("No appropriate expression was passed.");
	}
}