Lambda expressions in C# allow you to define anonymous methods or functions on the fly. Combined with delegates, you can create dynamic behaviors in your code, where you determine what a method does at runtime.

Here's an example that demonstrates this concept:

using System;

public class Program
{
    public static void Main()
    {
        // Define a dynamic behavior using a lambda expression
        Func<int, int, int> dynamicOperation = (x, y) => x + y;

        // Use the dynamic behavior to perform an operation
        int result = PerformOperation(5, 3, dynamicOperation);
        Console.WriteLine($"Result: {result}");
    }

    public static int PerformOperation(int a, int b, Func<int, int, int> operation)
    {
        return operation(a, b);
    }
}

In this example, we define a dynamicOperation variable as a Func<int, int, int> delegate that takes two integers and returns their sum. We can change the behavior of dynamicOperation by assigning different lambda expressions to it at runtime.

The PerformOperation method accepts two integers and a delegate representing an operation to perform. In this way, you can pass different operations to PerformOperation and achieve dynamic behavior based on the operation you provide.

This approach is highly flexible and allows you to create code that adapts to changing requirements by changing the behavior of the delegates at runtime. It's a powerful technique for building extensible and configurable components in your applications.