将Linq转换为列表得到匿名类型错误

我在S/O上看到过类似的错误，但是修复并没有直接告诉我。

Cannot implicitly convert type 'System.Collections.Generic.List<AnonymousType#1>' to 'System.Collections.Generic.List<DTD.ManagedMPS.Core.EtchVectorShapes>'

我需要做什么来传递这个linq查询作为我的特定列表?

public List<EtchVectorShapes> GetEtchVectors(List<ViolationType> list, List<ExcelViolations> excelViolations)
    {
        var etchVector = new List<EtchVectorShapes>();
        etchVector = (from vio in list
                        where excelViolations.Any(excelVio => vio.VioID.Formatted.Equals(excelVio.VioID.ToString()))
                            && excelViolations.Any(excelVio => vio.RuleType.Formatted.Equals(excelVio.RuleType))
                            && excelViolations.Any(excelVio => vio.VioType.Formatted.Equals(excelVio.VioType)) 
                            && excelViolations.Any(excelVio => vio.EtchVects.Any(x => x.XCoordinate.Equals(excelVio.XCoordinate)))
                            && excelViolations.Any(excelVio => vio.EtchVects.Any(y => y.YCoordinate.Equals(excelVio.YCoordinate)))
                        select new
                        {
                            EtchVectors =  vio.EtchVects  // firstOrDefault.Formatted
                        }).ToList();

        return etchVector;
    }