Can .NET convert “Yes” & “No” to boolean without If?

Question

You would think there would be a way using DirectCast, TryCast, CType etc but all of them seem to choke on it e.g.:

CType(\"Yes\", Boolean)

Answer 1

private static bool GetBool(string condition)
{
    return condition.ToLower() == "yes";
}

GetBool("Yes"); // true
GetBool("No"); // false

Or another approach using extension methods

public static bool ToBoolean(this string str)
{
    return str.ToLower() == "yes";
}

bool answer = "Yes".ToBoolean(); // true
bool answer = "AnythingOtherThanYes".ToBoolean(); // false