ExceptionDispatchInfo.Capture(ex.InnerException).Throw() — Example showing how the stack trace changes versus simply rethrowing

Program.cs

using System;
using System.Runtime.ExceptionServices;

class Program
{
    static void A()
    {
        try
        {
            B();

            // if uncaught:
            // System.Exception: Oh noes
            //  ---> System.NotImplementedException: The method or operation is not implemented.
            //    at Program.C()
            //    at Program.B()
            //    --- End of inner exception stack trace ---
            //    at Program.B()
            //    at Program.A()
            //    at Program.Main()
        }
        catch (Exception ex)
        {
            throw ex.InnerException;
            // System.NotImplementedException: The method or operation is not implemented.
            //    at Program.A()
            //    at Program.Main()

            ExceptionDispatchInfo.Capture(ex.InnerException).Throw();
            // System.NotImplementedException: The method or operation is not implemented.
            //    at Program.C()
            //    at Program.B()
            // --- End of stack trace from previous location ---
            //    at Program.A()
            //    at Program.Main()
        }
    }

    static void B()
    {
        try
        {
            C();
        }
        catch (Exception ex)
        {
            throw new Exception("Oh noes", ex);
        }
    }

    static void C()
    {
        throw new NotImplementedException();
    }

    static void Main()
    {
        A();
    }
}

https://sharplab.io/#v2:C4LgTgrgdgPgAgJgIwFgBQcAMACOSB0AStMAJYC2ApvgKIAeAxpQA5kD2UAypWAG6lMAzgG506RLiQB2dAG902RZIBsuACzYAggAoAlAqXy0Sk9mBgAngdPYjNmwCE9o4/YC+10wwCGwBgAtsbXomVlIObEo6fVcbO3sTAHpEs38wNgB3SLp8AEkoKB4QlnYoFwSTYrCOABFSQWZfAPyAMzZ8AGFvVggwSm0ovIKixhLwqF18ABU0zOdPEw9Y7CXPPFU4DScYk3ibcytl3YX7DvmjpSWEnz9A4NHqqGyd+z2K4Fmswqyq0u0AIgA8oEoGxKIJ/gAaZ7ldyeVbLdbqbBnF6KN6mD7pL6ULIAOTYwFy5GYABtKFQoMBKAATX7jZxKeGeNZIDYaACy3lIUD0ngxSh0ulhiiWbiAA===