ISpatialReferenceFactory3 spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
outSR = spatialReferenceFactory.CreateSpatialReference(sr.FactoryCod);

ISpatialReferenceResolution spatialReferenceResolution = outSR as ISpatialReferenceResolution;
spatialReferenceResolution.ConstructFromHorizon();

spatialReferenceResolution.SetDefaultXYResolution();

ISpatialReferenceTolerance spatialReferenceTolerance = spatialReferenceResolution as ISpatialReferenceTolerance;
spatialReferenceTolerance.SetDefaultXYTolerance();