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Simply by changing it back to what it was originally. &nbsp;The 'static' keyword should only be used if it is <b>really </b>needed. &nbsp;You can probably do what you want without having to make a major underlying change as to how things operate (by using static) in the background.
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Simply by changing it back to what it was originally.  The 'static' keyword should only be used if it is really needed.  You can probably do what you want without having to make a major underlying change as to how things operate (by using static) in the background.

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By changing it back, how can I call it from WPF user control?
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By changing it back, how can I call it from WPF user control?

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You need to use events to communicate<br />
Also look at<br />
<a href="https://msdn.microsoft.com/en-us/library/ff725477(v=expression.40).aspx" rel="ugc">https://msdn.microsoft.com/en-us/library/ff725477(v=expression.40).aspx</a>
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You need to use events to communicate
Also look at
https://msdn.microsoft.com/en-us/library/ff725477(v=expression.40).aspx [https://msdn.microsoft.com/en-us/library/ff725477(v=expression.40).aspx]

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It makes exactly what I needed.
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Could anybody help, I need to call a method in main window from a WPF user control and I changed this method to &quot;static&quot; and now for all field involved in this method I also got a message &quot;an object reference is required for the non-static field method or property&quot;.<br />
How can I resolve this?
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Could anybody help, I need to call a method in main window from a WPF user control and I changed this method to "static" and now for all field involved in this method I also got a message "an object reference is required for the non-static field method or property".
How can I resolve this?

C# WPF functionality

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).