which of the following string methods can be used to determine if a string contains only ‘\n’ characters?

Code Example - which of the following string methods can be used to determine if a string contains only ‘\n’ characters?

                
                        bool ConsistsOnly(string input, char wanted){
	input = input.Trim();
	foreach(char current in input){
    	if(current != wanted){
        	return false;
        }
    }
    return true;
}