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Gets or sets the error type of the range to be ignored.
IgnoredErrorType IgnoredError { get; set; }
Property IgnoredError As IgnoredErrorType
IRange range = worksheet.Range["A1"];
range.Value = "\'123";
range.IgnoredError = IgnoredErrorType.NumberAsText;
IgnoredErrorType ignoredErrors = range.IgnoredError;