If I understand correctly, you want to both generate and reference the DLL all at run time. The good news is that you can load an assembly at run time using Assembly.LoadFrom
.
The below is taken from the documentation and the technique is called Reflection.
Assembly SampleAssembly;
SampleAssembly = Assembly.LoadFrom("c:\\A.dll");
// Obtain a reference to a method known to exist in assembly.
var aTypes = SampleAssembly.GetTypes();
MethodInfo Method = aTypes[0].GetMethod("Method1");
// Obtain a reference to the parameters collection of the MethodInfo instance.
ParameterInfo[] Params = Method.GetParameters();
// Display information about method parameters.
// Param = sParam1
// Type = System.String
// Position = 0
// Optional=False
foreach (ParameterInfo Param in Params)
{
Console.WriteLine("Param=" + Param.Name.ToString());
Console.WriteLine(" Type=" + Param.ParameterType.ToString());
Console.WriteLine(" Position=" + Param.Position.ToString());
Console.WriteLine(" Optional=" + Param.IsOptional.ToString());
}