code.cs

List<string> someStrings = new List<string>() { “hello”, “goodbye”, “thanks”};

int count = someStrings.Count();
int count2 = someString.Count;

methods.cs

  public IEnumerable<Contact> GetContacts(){

		IEnumerable<Contact> list = SomeServiceWhichReturnsListOfContacts();

		return list;

}

	public IEnumerable<Contact> GetContacts(){

		IEnumerable<Contact> list = SomeServiceWhichReturnsListOfContacts();

		return list.ToList();

}

try_catch.cs

//A.) 
try{
//some great c# code
}
catch(Exception ex){
 throw;
}

//B.) 
try{
//some great c# code
}
catch(Exception ex){
 throw ex;
}

//C.) 
try{
//some great c# code
}
catch(Exception ex){
 throw new ApplicationException(ex);
}