How to use the Join method in LINQ for a join operation between two sequences

When working with LINQ, the Join method is used to perform a join operation between two sequences based on a common key.

Example:

Suppose we have two sequences, SequenceA and SequenceB, and we want to join them based on a common key:

List<string> SequenceA = new List<string> { "A", "B", "C" };
List<string> SequenceB = new List<string> { "B", "C", "D" };

var result = SequenceA.Join(SequenceB,
                a => a,
                b => b,
                (a, b) => new { ValueA = a, ValueB = b });
    

In this example, we are joining SequenceA and SequenceB based on the common key values. The result will be a sequence of anonymous objects containing the matched values from both sequences.

By using the Join method in LINQ, you can easily perform join operations between two sequences in a concise and efficient manner.

For more information on how to use LINQ Join method, refer to the official Microsoft documentation.