Added ability to change the default unit for .ToString()

UnitsNet.Tests/CustomCode/LengthTests.cs

@@ -20,6 +20,7 @@
 // THE SOFTWARE.
 
 using NUnit.Framework;
+using UnitsNet.Units;
 
 namespace UnitsNet.Tests.CustomCode
 {
@@ -88,5 +89,25 @@ public void LengthTimesLengthEqualsArea()
             Area area = Length.FromMeters(10)*Length.FromMeters(2);
             Assert.AreEqual(area, Area.FromSquareMeters(20));
         }
+
+        [Test]
+        public void ToStringReturnsCorrectNumberAndUnitWithDefaultUnitWhichIsMeter()
+        {
+            Length.ToStringDefaultUnit = LengthUnit.Meter;
+            Length meter = Length.FromMeters(5);
+            string meterString = meter.ToString();
+            Assert.AreEqual("5 m", meterString);
+        }
+
+        [Test]
+        public void ToStringReturnsCorrectNumberAndUnitWithCentimeterAsDefualtUnit()
+        {
+            LengthUnit oldUnit = Length.ToStringDefaultUnit;
+            Length.ToStringDefaultUnit = LengthUnit.Centimeter;
+            Length value = Length.From(2, LengthUnit.Centimeter);
+            string valueString = value.ToString();
+            Length.ToStringDefaultUnit = oldUnit;
+            Assert.AreEqual("2 cm", valueString);
+        }
     }
 }

UnitsNet.Tests/CustomCode/VolumeTests.cs

@@ -43,6 +43,8 @@ public class VolumeTests : VolumeTestsBase
 
         protected override double CubicMillimetersInOneCubicMeter => 1E9;
 
+        protected override double CubicMicrometersInOneCubicMeter => 1E18;
+
         protected override double CubicYardsInOneCubicMeter => 1.30795062;
 
         protected override double DecilitersInOneCubicMeter => 1E4;

UnitsNet.Tests/GeneratedCode/VolumeTestsBase.g.cs

@@ -43,6 +43,7 @@ public abstract partial class VolumeTestsBase
         protected abstract double CubicInchesInOneCubicMeter { get; }
         protected abstract double CubicKilometersInOneCubicMeter { get; }
         protected abstract double CubicMetersInOneCubicMeter { get; }
+        protected abstract double CubicMicrometersInOneCubicMeter { get; }
         protected abstract double CubicMilesInOneCubicMeter { get; }
         protected abstract double CubicMillimetersInOneCubicMeter { get; }
         protected abstract double CubicYardsInOneCubicMeter { get; }
@@ -68,6 +69,7 @@ public abstract partial class VolumeTestsBase
         protected virtual double CubicInchesTolerance { get { return 1e-5; } }
         protected virtual double CubicKilometersTolerance { get { return 1e-5; } }
         protected virtual double CubicMetersTolerance { get { return 1e-5; } }
+        protected virtual double CubicMicrometersTolerance { get { return 1e-5; } }
         protected virtual double CubicMilesTolerance { get { return 1e-5; } }
         protected virtual double CubicMillimetersTolerance { get { return 1e-5; } }
         protected virtual double CubicYardsTolerance { get { return 1e-5; } }
@@ -97,6 +99,7 @@ public void CubicMeterToVolumeUnits()
             Assert.AreEqual(CubicInchesInOneCubicMeter, cubicmeter.CubicInches, CubicInchesTolerance);
             Assert.AreEqual(CubicKilometersInOneCubicMeter, cubicmeter.CubicKilometers, CubicKilometersTolerance);
             Assert.AreEqual(CubicMetersInOneCubicMeter, cubicmeter.CubicMeters, CubicMetersTolerance);
+            Assert.AreEqual(CubicMicrometersInOneCubicMeter, cubicmeter.CubicMicrometers, CubicMicrometersTolerance);
             Assert.AreEqual(CubicMilesInOneCubicMeter, cubicmeter.CubicMiles, CubicMilesTolerance);
             Assert.AreEqual(CubicMillimetersInOneCubicMeter, cubicmeter.CubicMillimeters, CubicMillimetersTolerance);
             Assert.AreEqual(CubicYardsInOneCubicMeter, cubicmeter.CubicYards, CubicYardsTolerance);
@@ -125,6 +128,7 @@ public void FromValueAndUnit()
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicInch).CubicInches, CubicInchesTolerance);
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicKilometer).CubicKilometers, CubicKilometersTolerance);
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicMeter).CubicMeters, CubicMetersTolerance);
+            Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicMicrometer).CubicMicrometers, CubicMicrometersTolerance);
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicMile).CubicMiles, CubicMilesTolerance);
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicMillimeter).CubicMillimeters, CubicMillimetersTolerance);
             Assert.AreEqual(1, Volume.From(1, VolumeUnit.CubicYard).CubicYards, CubicYardsTolerance);
@@ -154,6 +158,7 @@ public void As()
             Assert.AreEqual(CubicInchesInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicInch), CubicInchesTolerance);
             Assert.AreEqual(CubicKilometersInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicKilometer), CubicKilometersTolerance);
             Assert.AreEqual(CubicMetersInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicMeter), CubicMetersTolerance);
+            Assert.AreEqual(CubicMicrometersInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicMicrometer), CubicMicrometersTolerance);
             Assert.AreEqual(CubicMilesInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicMile), CubicMilesTolerance);
             Assert.AreEqual(CubicMillimetersInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicMillimeter), CubicMillimetersTolerance);
             Assert.AreEqual(CubicYardsInOneCubicMeter, cubicmeter.As(VolumeUnit.CubicYard), CubicYardsTolerance);
@@ -183,6 +188,7 @@ public void ConversionRoundTrip()
             Assert.AreEqual(1, Volume.FromCubicInches(cubicmeter.CubicInches).CubicMeters, CubicInchesTolerance);
             Assert.AreEqual(1, Volume.FromCubicKilometers(cubicmeter.CubicKilometers).CubicMeters, CubicKilometersTolerance);
             Assert.AreEqual(1, Volume.FromCubicMeters(cubicmeter.CubicMeters).CubicMeters, CubicMetersTolerance);
+            Assert.AreEqual(1, Volume.FromCubicMicrometers(cubicmeter.CubicMicrometers).CubicMeters, CubicMicrometersTolerance);
             Assert.AreEqual(1, Volume.FromCubicMiles(cubicmeter.CubicMiles).CubicMeters, CubicMilesTolerance);
             Assert.AreEqual(1, Volume.FromCubicMillimeters(cubicmeter.CubicMillimeters).CubicMeters, CubicMillimetersTolerance);
             Assert.AreEqual(1, Volume.FromCubicYards(cubicmeter.CubicYards).CubicMeters, CubicYardsTolerance);

UnitsNet/CustomCode/UnitClasses/Length.extra.cs

@@ -20,6 +20,7 @@
 // THE SOFTWARE.
 
 using System;
+using System.Diagnostics;
 using System.Globalization;
 using UnitsNet.Units;
 

UnitsNet/GeneratedCode/Enums/VolumeUnit.g.cs

@@ -32,6 +32,7 @@ public enum VolumeUnit
         CubicInch,
         CubicKilometer,
         CubicMeter,
+        CubicMicrometer,
         CubicMile,
         CubicMillimeter,
         CubicYard,

UnitsNet/GeneratedCode/UnitClasses/Acceleration.g.cs

@@ -473,13 +473,18 @@ public static AccelerationUnit ParseUnit(string str, IFormatProvider formatProvi
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is MeterPerSecondSquared
+        /// </summary>
+        public static AccelerationUnit ToStringDefaultUnit { get; set; } = AccelerationUnit.MeterPerSecondSquared;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(AccelerationUnit.MeterPerSecondSquared);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/AmplitudeRatio.g.cs

@@ -401,13 +401,18 @@ public static AmplitudeRatioUnit ParseUnit(string str, IFormatProvider formatPro
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is DecibelVolt
+        /// </summary>
+        public static AmplitudeRatioUnit ToStringDefaultUnit { get; set; } = AmplitudeRatioUnit.DecibelVolt;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(AmplitudeRatioUnit.DecibelVolt);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Angle.g.cs

@@ -533,13 +533,18 @@ public static AngleUnit ParseUnit(string str, IFormatProvider formatProvider = n
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Degree
+        /// </summary>
+        public static AngleUnit ToStringDefaultUnit { get; set; } = AngleUnit.Degree;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(AngleUnit.Degree);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Area.g.cs

@@ -533,13 +533,18 @@ public static AreaUnit ParseUnit(string str, IFormatProvider formatProvider = nu
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is SquareMeter
+        /// </summary>
+        public static AreaUnit ToStringDefaultUnit { get; set; } = AreaUnit.SquareMeter;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(AreaUnit.SquareMeter);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Density.g.cs

@@ -533,13 +533,18 @@ public static DensityUnit ParseUnit(string str, IFormatProvider formatProvider =
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is KilogramPerCubicMeter
+        /// </summary>
+        public static DensityUnit ToStringDefaultUnit { get; set; } = DensityUnit.KilogramPerCubicMeter;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(DensityUnit.KilogramPerCubicMeter);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Duration.g.cs

@@ -533,13 +533,18 @@ public static DurationUnit ParseUnit(string str, IFormatProvider formatProvider
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Second
+        /// </summary>
+        public static DurationUnit ToStringDefaultUnit { get; set; } = DurationUnit.Second;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(DurationUnit.Second);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/ElectricCurrent.g.cs

@@ -453,13 +453,18 @@ public static ElectricCurrentUnit ParseUnit(string str, IFormatProvider formatPr
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Ampere
+        /// </summary>
+        public static ElectricCurrentUnit ToStringDefaultUnit { get; set; } = ElectricCurrentUnit.Ampere;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(ElectricCurrentUnit.Ampere);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/ElectricPotential.g.cs

@@ -433,13 +433,18 @@ public static ElectricPotentialUnit ParseUnit(string str, IFormatProvider format
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Volt
+        /// </summary>
+        public static ElectricPotentialUnit ToStringDefaultUnit { get; set; } = ElectricPotentialUnit.Volt;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(ElectricPotentialUnit.Volt);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/ElectricResistance.g.cs

@@ -393,13 +393,18 @@ public static ElectricResistanceUnit ParseUnit(string str, IFormatProvider forma
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Ohm
+        /// </summary>
+        public static ElectricResistanceUnit ToStringDefaultUnit { get; set; } = ElectricResistanceUnit.Ohm;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(ElectricResistanceUnit.Ohm);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Energy.g.cs

@@ -593,13 +593,18 @@ public static EnergyUnit ParseUnit(string str, IFormatProvider formatProvider =
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Joule
+        /// </summary>
+        public static EnergyUnit ToStringDefaultUnit { get; set; } = EnergyUnit.Joule;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(EnergyUnit.Joule);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Flow.g.cs

@@ -453,13 +453,18 @@ public static FlowUnit ParseUnit(string str, IFormatProvider formatProvider = nu
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is CubicMeterPerSecond
+        /// </summary>
+        public static FlowUnit ToStringDefaultUnit { get; set; } = FlowUnit.CubicMeterPerSecond;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(FlowUnit.CubicMeterPerSecond);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Force.g.cs

@@ -493,13 +493,18 @@ public static ForceUnit ParseUnit(string str, IFormatProvider formatProvider = n
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Newton
+        /// </summary>
+        public static ForceUnit ToStringDefaultUnit { get; set; } = ForceUnit.Newton;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(ForceUnit.Newton);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/ForceChangeRate.g.cs

@@ -353,13 +353,18 @@ public static ForceChangeRateUnit ParseUnit(string str, IFormatProvider formatPr
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is NewtonPerSecond
+        /// </summary>
+        public static ForceChangeRateUnit ToStringDefaultUnit { get; set; } = ForceChangeRateUnit.NewtonPerSecond;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(ForceChangeRateUnit.NewtonPerSecond);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>

UnitsNet/GeneratedCode/UnitClasses/Frequency.g.cs

@@ -493,13 +493,18 @@ public static FrequencyUnit ParseUnit(string str, IFormatProvider formatProvider
 
         #endregion
 
+        /// <summary>
+        ///     Set the default unit used by ToString(). Default is Hertz
+        /// </summary>
+        public static FrequencyUnit ToStringDefaultUnit { get; set; } = FrequencyUnit.Hertz;
+
         /// <summary>
         ///     Get default string representation of value and unit.
         /// </summary>
         /// <returns>String representation.</returns>
         public override string ToString()
         {
-            return ToString(FrequencyUnit.Hertz);
+            return ToString(ToStringDefaultUnit);
         }
 
         /// <summary>