[C#]

private void ConstructCoordinateSystem(bool highPrecision)
{

patialReferenceFactory3 spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
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SpatialReference3 spatialReference = spatialReferenceFactory.CreateESRISpatialReferenceFromPRJFile("C:\\Program Files\\ArcGIS\\Coordinate Systems\\Geographic Coordinate Systems\\World\\WGS 1984.prj") as ISpatialReference3;

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ontrolPrecision2 controlPrecision = spatialReference as IControlPrecision2;
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//Determines whether you are constructing a high or low.
controlPrecision.IsHighPrecision = highPrecision;   
ISpatialReferenceResolution spatialReferenceResolution = spatialReference as ISpatialReferenceResolution;


//These three methods are the keys, construct horizon, then set the default x,y resolution and tolerance.
spatialReferenceResolution.ConstructFromHorizon();


//Set the default x,y resolution value.
spatialReferenceResolution.SetDefaultXYResolution(); 


//Set the default x,y tolerance value.
ISpatialReferenceTolerance spatialReferenceTolerance = spatialReference as ISpatialReferenceTolerance;
spatialReferenceTolerance.SetDefaultXYTolerance();


double xMin;
double xMax;
double yMin;
double yMax;
spatialReference.GetDomain(out xMin, out xMax, out yMin, out yMax);


ystem.Windows.Forms.MessageBox.Show("Domain : "+ xMin +", "+  xMax + ", "+ yMin +", "+ yMax);

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}