CSHARP

how to append something to a string in c#

string fName = "hello ";    
string lName = "world";    
string Name = string.Concat(fName, lName); 
//or
string firstName = "hello ";    
string lastName = "world";    
string name = firstName + " " + lastName; 

c# how to add a character to string

string oldString = "1+1=";
string newString = oldString+"2"; //newString = "1+1=2"