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private void ReadMaterialProps(Document document, Material material){    ElementId strucAssetId = material.StructuralAssetId;    if (strucAssetId != ElementId.InvalidElementId)    {        PropertySetElement pse = document.GetElement(strucAssetId) asPropertySetElement;        if (pse != null)        {            StructuralAsset asset = pse.GetStructuralAsset();            // Check the material behavior and only read if Isotropic            if (asset.Behavior == StructuralBehavior.Isotropic)            {                // Get the class of material                StructuralAssetClass assetClass = asset.StructuralAssetClass; // Get other material properties                // Get other material properties                double poisson = asset.PoissonRatio.X;                double youngMod = asset.YoungModulus.X;                double thermCoeff = asset.ThermalExpansionCoefficient.X;                double unitweight = asset.Density;                double shearMod = asset.ShearModulus.X;                double dampingRatio = asset.DampingRatio;                if (assetClass == StructuralAssetClass.Metal)                {                    double dMinStress = asset.MinimumYieldStress;                }                elseif (assetClass == StructuralAssetClass.Concrete)                {                    double dConcComp = asset.ConcreteCompression;                }            }        }    }}