Question: Is there a way to dump the generated sql to the Debug log or something? I'm using it in a winforms solution so the mini-profiler idea won't work for me.

Answer: 
Dapper does not currently have an instrumentation point here. This is perhaps due, as you note, to the fact that we (as the authors) use mini-profiler to handle this. However, if it helps, the core parts of mini-profiler are actually designed to be architecture neutral, and I know of other people using it with winforms, wpf, wcf, etc - which would give you access to the profiling / tracing connection wrapper.

In theory, it would be perfectly possible to add some blanket capture-point, but I'm concerned about two things:

* (primarily) security: since dapper doesn't have a concept of a context, it would be *really really* easy for malign code to attach quietly to sniff all sql traffic that goes via dapper; I really don't like the sound of that (this isn't an issue with the "decorator" approach, as the caller owns the connection, hence the logging context)
* (secondary) performance: but... in truth, it is hard to say that a simple delegate-check (which would presumably be `null` in most cases) would have much impact

Of course, the other thing you could do is: steal the connection wrapper code from mini-profiler, and replace the profiler-context stuff with just: `Debug.WriteLine` etc.
This is not exhaustive and is essentially a bit of hack, but if you have your SQL and you want to initialize your parameters, it's useful for basic debugging. Set up this extension method, then call it anywhere as desired.

```
public static class DapperExtensions
{
    public static string ArgsAsSql(this DynamicParameters args)
    {
        if (args is null) throw new ArgumentNullException(nameof(args));
        var sb = new StringBuilder();
        foreach (var name in args.ParameterNames)
        {
            var pValue = args.Get<dynamic>(name);

            var type = pValue.GetType();

            if (type == typeof(DateTime))
            sb.AppendFormat("DECLARE @{0} DATETIME ='{1}'\n", name, pValue.ToString("yyyy-MM-dd HH:mm:ss.fff"));
            else if (type == typeof(bool))
                sb.AppendFormat("DECLARE @{0} BIT = {1}\n", name, (bool)pValue ? 1 : 0);
            else if (type == typeof(int))
                sb.AppendFormat("DECLARE @{0} INT = {1}\n", name, pValue);
            else if (type == typeof(List<int>))
                sb.AppendFormat("-- REPLACE @{0} IN SQL: ({1})\n", name, string.Join(",", (List<int>)pValue));
            else
                sb.AppendFormat("DECLARE @{0} NVARCHAR(MAX) = '{1}'\n", name, pValue.ToString());
        }
        return sb.ToString();
    }
}

```

You can then just use this in the immediate or watch windows to grab the SQL.