Making the ToString paramters optional (IFormattable)

CodeGen/Generators/UnitsNetGen/QuantityGenerator.cs

@@ -1162,32 +1162,11 @@ public override string ToString()
             return ToString(null, null);
         }}
 
-        /// <summary>
-        ///     Gets the default string representation of value and unit using the given format provider.
-        /// </summary>
-        /// <returns>String representation.</returns>
-        /// <param name=""provider"">Format to use for localization and number formatting. Defaults to <see cref=""CultureInfo.CurrentCulture"" /> if null.</param>
-        public string ToString(IFormatProvider? provider)
-        {{
-            return ToString(null, provider);
-        }}
-
-        /// <inheritdoc cref=""QuantityFormatter.Format{{TQuantity}}(TQuantity, string?, IFormatProvider?)""/>
-        /// <summary>
-        /// Gets the string representation of this instance in the specified format string using <see cref=""CultureInfo.CurrentCulture"" />.
-        /// </summary>
-        /// <param name=""format"">The format string.</param>
-        /// <returns>The string representation.</returns>
-        public string ToString(string? format)
-        {{
-            return ToString(format, null);
-        }}
-
         /// <inheritdoc cref=""QuantityFormatter.Format{{TQuantity}}(TQuantity, string?, IFormatProvider?)""/>
         /// <summary>
         /// Gets the string representation of this instance in the specified format string using the specified format provider, or <see cref=""CultureInfo.CurrentCulture"" /> if null.
         /// </summary>
-        public string ToString(string? format, IFormatProvider? provider)
+        public string ToString(string? format = null, IFormatProvider? provider = null)
         {{
             return QuantityFormatter.Default.Format(this, format, provider);
         }}

CodeGen/Generators/UnitsNetGen/UnitTestBaseClassGenerator.cs

@@ -1045,7 +1045,7 @@ public void ToString_WithSwedishCulture_ReturnsUnitAbbreviationForEnglishCulture
             foreach (var unit in _quantity.Units)
             {
                 Writer.WL($@"
-            Assert.Equal(""1{GetEnglishAbbreviation(unit)}"", new {_quantity.Name}(1, {GetUnitFullName(unit)}).ToString(swedishCulture));");
+            Assert.Equal(""1{GetEnglishAbbreviation(unit)}"", new {_quantity.Name}(1, {GetUnitFullName(unit)}).ToString(null, swedishCulture));");
             }
             Writer.WL($@"
         }}

UnitsNet.Tests/CustomCode/LengthTests.cs

@@ -167,15 +167,15 @@ public void LengthTimesSpecificWeightEqualsPressure()
         public void ToStringReturnsCorrectNumberAndUnitWithDefaultUnitWhichIsMeter()
         {
             var meter = Length.FromMeters(5);
-            string meterString = meter.ToString(CultureInfo.InvariantCulture);
+            string meterString = meter.ToString(null, CultureInfo.InvariantCulture);
             Assert.Equal("5 m", meterString);
         }
 
         [Fact]
         public void ToStringReturnsCorrectNumberAndUnitWithCentimeterAsDefaultUnit()
         {
             var value = Length.From(2, LengthUnit.Centimeter);
-            string valueString = value.ToString(CultureInfo.InvariantCulture);
+            string valueString = value.ToString(null, CultureInfo.InvariantCulture);
             Assert.Equal("2 cm", valueString);
         }
 

UnitsNet.Tests/CustomQuantities/HowMuch.cs

@@ -69,7 +69,6 @@ public IQuantity ToUnit(Enum unit)
 
         public override string ToString() => $"{Value} {Unit}";
         public string ToString(string? format, IFormatProvider? formatProvider) => $"HowMuch ({format}, {formatProvider})";
-        public string ToString(IFormatProvider? provider) => $"HowMuch ({provider})";
 
         #endregion
     }