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Console.Error Property

.NET Framework 4

Other Versions

Gets the standard error output stream.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

Copy

public static TextWriter Error { get; }

Property Value

Type: System.IO.TextWriter
A TextWriter that represents the standard error output stream.

Remarks

This property is set to the standard error stream by default. This property can be set to another stream with the SetError method.

Examples

The following code example illustrates the use of the Error property.

C++

Copy


public class ExpandTabs {
    private const int tabSize = 4;
    private const string usageText = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
    public static int Main(string[] args) {
        StreamWriter writer = null;
        TextWriter standardOutput = Console.Out;

        if (args.Length < 2) {
            Console.WriteLine(usageText);
            return 1;
        }

        try {
            writer = new StreamWriter(args[1]);
            Console.SetOut(writer);
            Console.SetIn(new StreamReader(args[0]));
        }
        catch(IOException e) {
            TextWriter errorWriter = Console.Error;
            errorWriter.WriteLine(e.Message);
            errorWriter.WriteLine(usageText);
            return 1;            
        }
        int i;
        while ((i = Console.Read()) != -1) {
            char c = (char)i;
            if (c == '\t')
                Console.Write(("").PadRight(tabSize, ' '));
            else
                Console.Write(c);
        }
        writer.Close();
        // Recover the standard output stream so that a 
        // completion message can be displayed.
        Console.SetOut(standardOutput);
        Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args[0]);
        return 0;
    }
}

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

Console Class

System Namespace

Out

SetError

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