For example, if separator is ", " and the elements of value are "apple", "orange", "grape", and "pear", Join(separator, value, 1, 2) returns "orange, grape". If separator is null, an empty string (String.Empty) is used instead.

September 24, 2021 - string[] text = { "C#", "Java", "C++" }; // joins string with space between them Console.WriteLine(String.Join(" ", text)); Console.ReadLine(); } } } // Output: C# Java C++

Join helps because it does not insert the separating tag at the end. Step 1 The strings are concatenated with Join into 3 lines of markup in HTML, separated by the BR tag.

December 6, 2024 - string[] studyTasks = { "Complete C# lesson", "Review notes", "Practice coding exercises", "Read documentation" }; // Using .Join() to create a sequential to-do list with ", " as the separator ... Today's Codecademy study plan: Complete C# lesson, Review notes, Practice coding exercises, Read documentation ... The following example demonstrates how .Join() combines a collection of course names using an ampersand (&) to produce a readable list...

December 28, 2023 - Here, we have the words “Hello” and “World” joined together with a comma. As you see, String.Join() takes the separator and elements as parameters, allowing us to sew together strings with different types of string separators.

September 10, 2025 - Exception: This method can give ArgumentNullException if the L1 is null. Example: Joining the elements of a list of type String with the separator hyphen(-) using String.Join() method.

April 24, 2026 - * **count:** An **int** that specifies the number of elements to concatenate, starting from the **startIndex**. By utilizing these parameters, you can fine-tune how you join strings, control the inclusion of elements, and manage the placement of separators. ## Basic Usage of String.Join Look at a simple example of how to use the **String.Join** method.

December 3, 2019 - using System; class Program { static void Main() { char[] letter = { 'A', 'B', 'C' }; string result = String.Join("|", letter); Console.WriteLine(result); } } ... Here, in this example, we use the Join() method with startIndex and count.

March 25, 2025 - ... ArgumentOutOfRangeException: ... ArgumentNullException: If the array contains a null value. Example: Using the Join() method to separate the string with the specified count....

July 5, 2023 - The separator can be a char or a string. Since .NET 9, there are also overloads that take a ReadOnlySpan of strings or objects; the compiler uses them when we pass the values directly as arguments, such as string.Join(", ", a, b, c). The following example joins a list of strings.

To combine the elements of a collection, use String.Concat to join them with no separator, or String.Join to place a separator between each element:

December 29, 2023 - In this example, we use the StringBuilder class to append strings to an existing string. The Append method is pretty versatile – it ensures efficient memory usage and faster performance when dealing with large string operations. The String.Join method is a favourite, and for decent reasons.

string str2 = string.Join("_",str1); here Join method is joining all strings inside string array str1 with seperator _.

July 11, 2025 - Exception: This method can give ArgumentNullException if the L1 is null. Example: Joining the elements of a list of type String with the separator hyphen(-) using String.Join() method.

June 26, 2026 - To combine the elements of a collection, use String.Concat to join them with no separator, or String.Join to place a separator between each element:

1 month ago - This page covers string.Join with strings, numbers and objects, what it does with null elements, string.Concat and why LINQ's Aggregate is the wrong tool, the trailing-separator bug in StringBuilder loops and the AppendJoin fix, and the "a, b and c" variation. Each example runs on this page: ...

C# uses the + operator for both addition and concatenation. Remember: Numbers are added. Strings are concatenated.

October 28, 2023 - String.Join method also allows you to concatenate string items of any data type with a range. The following code example in Listing 7 concatenates an array of int values to a string separated by a comma and space.