how to join two strings in c# code example

Example 1: c# join string array

var combined = String.Join(",", new String[]{"a","b"});
// a,b

Example 2: c# string concatenation

string userName = "<Type your name here>";
string dateString = DateTime.Today.ToShortDateString();

// Use the + and += operators for one-time concatenations.
string str = "Hello " + userName + ". Today is " + dateString + ".";
System.Console.WriteLine(str);

str += " How are you today?";
System.Console.WriteLine(str);

Example 3: c# Add or Concatenate Strings In C#

string str1 = "ppp";  
string strRes = str1.Insert(2, "bbb");  
Console.WriteLine(strRes.ToString());