I am doing code reviews from time to time to my customers. When asking how lines of code do they have generally they do not know how to find it with an easy way.
Visual studio 2012 and 2010 has a cool feature called code metrics which you can use under analyze tab or just by right clicking the solution.
Code metrics results shows you how many lines of code do you have. Also this report has some useful info that may help you. The maintability index ratio is calculated by a formula using Cyclomatic Complexity and lines of code. Bigger ratio means easier maintability. There is also a color in front of it which means
Green High Maintainability Between 20 and 100
Yellow Moderate Maintainability Between 10 and 20
Red Low Maintainability Between 0 and 9
Cyclomatic complexity measures the structural complexity of the code. High number for cyclomatic complexity indicates that the code may be too complex, and should be refactored.
Depth of inheritance indicates the number of class definitions that extend to the root of the class hierarcy.
Class coupling indicates the total number of dependencies that a class has on other classes.