In MonoDroid, that code translates to something like:
var resourceId = Resources.GetIdentifier(mDrawableName.ToLower(), "drawable", PackageName);
However, I personally don't use GetIdentifier as it's not recommended in Android - so I use Reflection instead:
var resourceId = (int)typeof(Resource.Drawable).GetField(mDrawable).GetValue(null);
although that code should definitely have some try/catch error checking added for arbitrary strings!
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…