#pragma warning
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#pragma warning (C# Reference)

#pragma warning can enable or disable certain warnings.

#pragma warning disable warning-list
#pragma warning restore warning-list

warning-list

A comma-separated list of warning numbers. Enter the numbers alone, without the "CS" prefix.

When no warning numbers are specified, disable disables all warnings and restore enables all warnings.

// pragma_warning.cs
using System;

#pragma warning disable 414, 3021
[CLSCompliant(false)]
public class C
{
    int i = 1;
    static void Main()
    {
    }
}
#pragma warning restore 3021
[CLSCompliant(false)]  // CS3021
public class D
{
    int i = 1;
    public static void F()
    {
    }
}
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