Nested sql transaction in .Net

I have two methods which start sql transaction and commit (or rollback) the connection inside the method.

public void Method1(SqlConnection connection)
{
    var trans = connection.BeginTransaction();
    // do some work
    trans.Commit(); // or trans.Rollback(); 
}

public void Method2(SqlConnection connection)
{
    var trans = connection.BeginTransaction();
    // do some work
    trans.Commit(); // or trans.Rollback(); 
}

I have to create another method which executes logic of Method 1 and 2 but in a single transaction.

public void Method1And2(SqlConnection connection)
{
    var trans = connection.BeginTransaction();
    // do work of method 1
    // do work of method 2
    trans.Commit(); // or trans.Rollback(); 
}

Instead of duplicating code of method 1 and 2 inside Method1And2, I would like to call Method1 and Method2 from Method1And2 but still keeping a single db transaction. Method1 and Method2 will also require their own transaction if they are invoked directly.

What is the best approach to implement this in .Net?

Thanks.