如何根据一个要素类（源要素类）在另一个工作空间中产生一个同字段，但空间范围可能不一致的要素类（目标要素类）？本文提供了完备的方法。

public ESRI.ArcGIS.Geodatabase.IFeatureClass CloneFeatureClass(ESRI.ArcGIS.Geodatabase.IFeatureClass srcFeatureClass, ESRI.ArcGIS.Geodatabase.IFeatureWorkspace SaveFeatWorkspace, string Name, ESRI.ArcGIS.Geometry.IEnvelope newEnvelope)
{
    if (Name == ""||Name ==null)
    {
        Name = srcFeatureClass.AliasName;
    }
    Name = this.getRightDatasetName(Name, ".");

    IFields pFields = this.CloneFeatureClassFields(srcFeatureClass, newEnvelope);
    //Anno要素类
    if (srcFeatureClass.FeatureType == esriFeatureType.esriFTAnnotation)
    {
        //Anno Workspace
        IFeatureWorkspaceAnno pFWSAnno =SaveFeatWorkspace as IFeatureWorkspaceAnno;
        //获得AnnoFeatureClass的显示参数units和referencescale
        IAnnoClass pAnnoClass = srcFeatureClass.Extension as IAnnoClass;

        IGraphicsLayerScale pGLS = new GraphicsLayerScaleClass();
        pGLS.Units = pAnnoClass.ReferenceScaleUnits;
        pGLS.ReferenceScale = pAnnoClass.ReferenceScale;

        ISymbol pSymbol = (ISymbol)MakeTextSymbol();
        //Anno要素类必须有的缺省符号
        ISymbolCollection2 pSymbolColl = new SymbolCollectionClass();
        ISymbolIdentifier2 pSymID = new SymbolIdentifierClass();
        pSymbolColl.AddSymbol(pSymbol, "Default", out pSymID);