public static AngularUnit Degrees {get;}

// convert 45 degrees to radians
double radians = AngularUnit.Degrees.ConvertToRadians(45);

// convert PI to degrees
double degrees = AngularUnit.Degrees.ConvertFromRadians(Math.PI);

// custom unit - 3 radians per unit
var myAngularUnit = AngularUnit.CreateAngularUnit("myCustomAngularUnit", 3);
string Name = myAngularUnit.Name;                   // myCustomAngularUnit
double Factor = myAngularUnit.ConversionFactor;     // 3
int Code = myAngularUnit.FactoryCode;               // 0 because it is a custom angular unit
double radiansUnit = myAngularUnit.RadiansPerUnit;  // 3

// convert 10 degrees to my unit
double converted = AngularUnit.Degrees.ConvertTo(10, myAngularUnit);
// convert it back to degrees
converted = myAngularUnit.ConvertTo(converted, AngularUnit.Degrees);

// convert 1 radian into my angular units
converted = myAngularUnit.ConvertFromRadians(1);

// get the wkt
string wkt = myAngularUnit.Wkt;

// create an angular unit from this wkt
var anotherAngularUnit = AngularUnit.CreateAngularUnit(wkt);
// anotherAngularUnit.ConversionFactor = 3
// anotherAngularUnit.FactoryCode = 0    
// anotherAngularUnit.RadiansPerUnit = 3