Minor refactoring of Equals methods in Length.cs
Minor refactoring of Equals methods in Length.cs

maherkassim/UnitsNet,anjdreas/UnitsNet,BrandonLWhite/UnitsNet,Tirael/UnitsNet,BrandonLWhite/UnitsNet,anjdreas/UnitsNet,neutmute/UnitsNet,maherkassim/UnitsNet,BoGrevyDynatest/UnitsNet