https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/002m/002m000003qq000000.htm
ISpatialReferenceTolerance.MTolerance Property (ArcObjects .NET 10.1 SDK)
propertysdk
https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/002m/002m000003r2000000.htm
ISpatialReferenceTolerance.XYToleranceValid Property (ArcObjects .NET 10.1 SDK)
propertysdk
https://resources.arcgis.com/en/help/arcobjects-net/componentHelp/002m/002m000003qv000000.htm
ISpatialReferenceTolerance.SetDefaultZTolerance Method (ArcObjects .NET 10.1 SDK)
methodsdk