WPF: Ultra fast and simple string painting using GlyphRun
Briefly

Writing a string to a precise location in WPF can be more efficient using the DrawingContext's DrawText method and GlyphRun to specify font attributes and distances between glyphs.
Utilizing the OnRender() method with DrawingContext for writing strings is preferred over conventional use of TextBox due to better efficiency, especially when needing to work with pixel-perfect positions.
Read at CodeProject
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