/// <summary>
/// Gets the types of the parameters for the given method.
/// </summary>
/// <param name="this">The <see cref="MethodBase"/> to get parameter types for.</param>
/// <returns>An array of <see cref="Type"/>s that map directly to the parameters (in terms of location) in the given method.</returns>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="this"/> is <c>null</c>.</exception>
/// <remarks>
/// If <paramref name="this"/> is a <see cref="MethodBuilder"/> or <see cref="ConstructorBuilder"/>,
/// no parameter type information can be determined, so the returned array will be empty.
/// </remarks>
public static Type[] GetParameterTypes(this MethodBase @this)
{
@this.CheckParameterForNull("@this");
var parameterTypes = Type.EmptyTypes;
if (!(@this is MethodBuilder) && !(@this is ConstructorBuilder))
{
parameterTypes = Array.ConvertAll <ParameterInfo, Type>(
@this.GetParameters(), (target) => target.ParameterType);
}
return(parameterTypes);
}
